diff --git a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
index 700f6f5ba..1ef8fd985 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
@@ -46,6 +46,23 @@ namespace SqlSugar
                 return this.Context.EntityMaintenance.GetEntityInfo<T>();
             }
         }
+        public ISugarQueryable<T, T2> LeftJoin<T2>(Expression<Func<T, T2, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression,JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2> InnerJoin<T2>(Expression<Func<T, T2, bool>> joinExpression) 
+        {
+            var result = InstanceFactory.GetQueryable<T, T2>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
         public void Clear()
         {
             QueryBuilder.Clear();
@@ -1578,6 +1595,30 @@ namespace SqlSugar
             }
             return result;
         }
+        protected JoinQueryInfo GetJoinInfo(Expression joinExpression,JoinType joinType)
+        {
+            QueryBuilder.CheckExpressionNew(joinExpression, "Join");
+            QueryBuilder.JoinExpression = joinExpression;
+            var express= LambdaExpression.Lambda(joinExpression).Body;
+            var lastPareamter= (express as LambdaExpression).Parameters.Last();
+            var expResult = this.QueryBuilder.GetExpressionValue(joinExpression, ResolveExpressType.WhereMultiple);
+            this.Context.InitMappingInfo(lastPareamter.Type);
+            var result= new JoinQueryInfo()
+            {
+                JoinIndex = QueryBuilder.JoinQueryInfos.Count,
+                JoinType = joinType,
+                JoinWhere = expResult.GetResultString(),
+                ShortName= lastPareamter.Name,
+                TableName=this.Context.EntityMaintenance.GetTableName(lastPareamter.Type)
+            };
+            if (result.JoinIndex == 0) 
+            {
+                var firstPareamter = (express as LambdaExpression).Parameters.First();
+                this.QueryBuilder.TableShortName = firstPareamter.Name;
+            }
+            Check.Exception(result.JoinIndex > 10, ErrorMessage.GetThrowMessage("只支持12个表", "Only 12 tables are supported"));
+            return result;
+        }
 
         private void _CountEnd(MappingTableList expMapping)
         {
@@ -2448,6 +2489,23 @@ namespace SqlSugar
     #region T2
     public partial class QueryableProvider<T, T2> : QueryableProvider<T>, ISugarQueryable<T, T2>
     {
+        public ISugarQueryable<T, T2,T3> LeftJoin<T3>(Expression<Func<T, T2,T3, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2,T3>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2,T3> InnerJoin<T3>(Expression<Func<T, T2,T3, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2,T3>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
         #region Where
         public new ISugarQueryable<T, T2> Where(Expression<Func<T, bool>> expression)
         {
@@ -2778,6 +2836,24 @@ namespace SqlSugar
     #region T3
     public partial class QueryableProvider<T, T2, T3> : QueryableProvider<T>, ISugarQueryable<T, T2, T3>
     {
+        public ISugarQueryable<T, T2, T3,T4> LeftJoin<T4>(Expression<Func<T, T2, T3,T4, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3,T4>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2, T3,T4> InnerJoin<T4>(Expression<Func<T, T2, T3,T4, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3,T4>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
+
         #region  Group 
         public ISugarQueryable<T, T2, T3> GroupBy(Expression<Func<T, T2, T3, object>> expression)
         {
@@ -3170,6 +3246,24 @@ namespace SqlSugar
     #region T4
     public partial class QueryableProvider<T, T2, T3, T4> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4>
     {
+        public ISugarQueryable<T, T2, T3, T4, T5> LeftJoin<T5>(Expression<Func<T, T2, T3, T4,T5, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2, T3, T4, T5> InnerJoin<T5>(Expression<Func<T, T2, T3, T4, T5, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
+
         #region Where
         public new ISugarQueryable<T, T2, T3, T4> Where(Expression<Func<T, bool>> expression)
         {
@@ -3604,6 +3698,24 @@ namespace SqlSugar
     #region T5
     public partial class QueryableProvider<T, T2, T3, T4, T5> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4, T5>
     {
+        public ISugarQueryable<T, T2, T3, T4, T5, T6> LeftJoin<T6>(Expression<Func<T, T2, T3, T4, T5,T6, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2, T3, T4, T5, T6> InnerJoin<T6>(Expression<Func<T, T2, T3, T4, T5, T6, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
+
         #region Where
         public new ISugarQueryable<T, T2, T3, T4, T5> Where(Expression<Func<T, bool>> expression)
         {
@@ -4000,6 +4112,23 @@ namespace SqlSugar
     #region T6
     public partial class QueryableProvider<T, T2, T3, T4, T5, T6> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4, T5, T6>
     {
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7> LeftJoin<T7>(Expression<Func<T, T2, T3, T4, T5, T6,T7, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7> InnerJoin<T7>(Expression<Func<T, T2, T3, T4, T5, T6, T7, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
         #region Where
         public new ISugarQueryable<T, T2, T3, T4, T5, T6> Where(Expression<Func<T, bool>> expression)
         {
@@ -4432,6 +4561,23 @@ namespace SqlSugar
     #region T7
     public partial class QueryableProvider<T, T2, T3, T4, T5, T6, T7> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4, T5, T6, T7>
     {
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> LeftJoin<T8>(Expression<Func<T, T2, T3, T4, T5, T6, T7,T8, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7, T8>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> InnerJoin<T8>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7, T8>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
         #region Where
         public new ISugarQueryable<T, T2, T3, T4, T5, T6, T7> Where(Expression<Func<T, bool>> expression)
         {
@@ -4855,6 +5001,23 @@ namespace SqlSugar
     #region T8
     public partial class QueryableProvider<T, T2, T3, T4, T5, T6, T7, T8> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8>
     {
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> LeftJoin<T9>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8,T9, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> InnerJoin<T9>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
         #region Where
         public new ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> Where(Expression<Func<T, bool>> expression)
         {
@@ -5311,6 +5474,23 @@ namespace SqlSugar
     #region T9
     public partial class QueryableProvider<T, T2, T3, T4, T5, T6, T7, T8, T9> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9>
     {
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9,T10> LeftJoin<T10>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> InnerJoin<T10>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
         #region Where
         public new ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> Where(Expression<Func<T, bool>> expression)
         {
@@ -5703,6 +5883,23 @@ namespace SqlSugar
     #region T10
     public partial class QueryableProvider<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10>
     {
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> LeftJoin<T11>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10,T11, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> InnerJoin<T11>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
         #region Where
         public new ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> Where(Expression<Func<T, bool>> expression)
         {
@@ -6119,6 +6316,23 @@ namespace SqlSugar
     #region T11
     public partial class QueryableProvider<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> : QueryableProvider<T>, ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>
     {
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> LeftJoin<T12>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11,T12, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Left));
+            return result;
+        }
+
+        public ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> InnerJoin<T12>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, bool>> joinExpression)
+        {
+            var result = InstanceFactory.GetQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this.Context.CurrentConnectionConfig);
+            result.SqlBuilder = this.SqlBuilder;
+            result.Context = this.Context;
+            result.QueryBuilder.JoinQueryInfos.Add(GetJoinInfo(joinExpression, JoinType.Inner));
+            return result;
+        }
         #region Where
         public new ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Where(Expression<Func<T, bool>> expression)
         {
diff --git a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/SqlBuilderProvider/QueryBuilder.cs b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/SqlBuilderProvider/QueryBuilder.cs
index b0aedbf7e..32ff4c5cd 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/SqlBuilderProvider/QueryBuilder.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/SqlBuilderProvider/QueryBuilder.cs
@@ -701,5 +701,33 @@ namespace SqlSugar
                 }
             }
         }
+        public void CheckExpressionNew(Expression expression, string methodName)
+        {
+            if (IsSingle() == false && this.JoinExpression != null)
+            {
+                var jsoinParameters = (this.JoinExpression as LambdaExpression).Parameters;
+                var currentParametres = (expression as LambdaExpression).Parameters;
+                if ((expression as LambdaExpression).Body.ToString() == "True")
+                {
+                    return;
+                }
+                if (currentParametres != null && currentParametres.Count > 0)
+                {
+                    if (jsoinParameters.Count + 1 != currentParametres.Count) 
+                    {
+                        var str1 = "(" + string.Join(",", currentParametres.Select(it => it.Name)) + ")=>";
+                        var str2 = "("+string.Join(",", jsoinParameters.Select(it => it.Name))+","+ currentParametres.Last().Type.Name + " )=>";
+                        throw new Exception(ErrorMessage.GetThrowMessage($"Join {currentParametres.Last().Type.Name} error , Please change {str1} to {str2}.", $"Join {currentParametres.Last().Type.Name} 错误, 请把 {str1} 改成 {str2} "));
+                    }
+                    foreach (var item in currentParametres.Take(jsoinParameters.Count))
+                    {
+                        var index = currentParametres.IndexOf(item);
+                        var name = item.Name;
+                        var joinName = jsoinParameters[index].Name;
+                        Check.Exception(name.ToLower() != joinName.ToLower(), ErrorMessage.ExpressionCheck, joinName, methodName, name);
+                    }
+                }
+            }
+        }
     }
 }
diff --git a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Interface/IQueryable.cs b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Interface/IQueryable.cs
index 540f05bfd..d3a4771bc 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Interface/IQueryable.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Interface/IQueryable.cs
@@ -19,6 +19,8 @@ namespace SqlSugar
         ISugarQueryable<T> AS<T2>(string tableName);
         ISugarQueryable<T> AS(string tableName);
         ISugarQueryable<T> With(string withString);
+        ISugarQueryable<T,T2> LeftJoin<T2>(Expression<Func<T,T2,bool>> joinExpression);
+        ISugarQueryable<T, T2> InnerJoin<T2>(Expression<Func<T, T2, bool>> joinExpression);
         ISugarQueryable<T> Filter(string FilterName, bool isDisabledGobalFilter = false);
         ISugarQueryable<T> Mapper(Action<T> mapperAction);
         ISugarQueryable<T> Mapper<AType, BType, MappingType>(Expression<Func<MappingType, ManyToMany>> expression);
@@ -179,6 +181,9 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2> : ISugarQueryable<T>
     {
+        ISugarQueryable<T, T2,T3> LeftJoin<T3>(Expression<Func<T,T2,T3,bool>> joinExpression);
+        ISugarQueryable<T, T2, T3> InnerJoin<T3>(Expression<Func<T, T2, T3, bool>> joinExpression);
+
         #region Where
         new ISugarQueryable<T, T2> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2> Where(Expression<Func<T, T2, bool>> expression);
@@ -264,6 +269,9 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3> : ISugarQueryable<T>
     {
+        ISugarQueryable<T, T2, T3,T4> LeftJoin<T4>(Expression<Func<T, T2, T3,T4, bool>> joinExpression);
+        ISugarQueryable<T, T2, T3,T4> InnerJoin<T4>(Expression<Func<T, T2, T3,T4, bool>> joinExpression);
+
         #region Where
         new ISugarQueryable<T, T2, T3> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2, T3> Where(Expression<Func<T, T2, bool>> expression);
@@ -360,6 +368,9 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4> : ISugarQueryable<T>
     {
+        ISugarQueryable<T, T2, T3, T4,T5> LeftJoin<T5>(Expression<Func<T, T2, T3, T4,T5, bool>> joinExpression);
+        ISugarQueryable<T, T2, T3, T4,T5> InnerJoin<T5>(Expression<Func<T, T2, T3, T4,T5, bool>> joinExpression);
+
         #region Where
         new ISugarQueryable<T, T2, T3, T4> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2, T3, T4> Where(Expression<Func<T, T2, bool>> expression);
@@ -463,6 +474,9 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4, T5> : ISugarQueryable<T>
     {
+        ISugarQueryable<T, T2, T3, T4, T5,T6> LeftJoin<T6>(Expression<Func<T, T2, T3, T4, T5,T6, bool>> joinExpression);
+        ISugarQueryable<T, T2, T3, T4, T5,T6> InnerJoin<T6>(Expression<Func<T, T2, T3, T4, T5,T6, bool>> joinExpression);
+
         #region Where
         new ISugarQueryable<T, T2, T3, T4, T5> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2, T3, T4, T5> Where(Expression<Func<T, T2, bool>> expression);
@@ -562,6 +576,9 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6> : ISugarQueryable<T>
     {
+        ISugarQueryable<T, T2, T3, T4, T5, T6,T7> LeftJoin<T7>(Expression<Func<T, T2, T3, T4, T5, T6,T7, bool>> joinExpression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6,T7> InnerJoin<T7>(Expression<Func<T, T2, T3, T4, T5, T6,T7, bool>> joinExpression);
+
         #region Where
         new ISugarQueryable<T, T2, T3, T4, T5, T6> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2, T3, T4, T5, T6> Where(Expression<Func<T, T2, bool>> expression);
@@ -668,6 +685,9 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7> : ISugarQueryable<T>
     {
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> LeftJoin<T8>(Expression<Func<T, T2, T3, T4, T5, T6, T7,T8, bool>> joinExpression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> InnerJoin<T8>(Expression<Func<T, T2, T3, T4, T5, T6, T7,T8, bool>> joinExpression);
+
         #region Where
         new ISugarQueryable<T, T2, T3, T4, T5, T6, T7> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7> Where(Expression<Func<T, T2, bool>> expression);
@@ -773,6 +793,9 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> : ISugarQueryable<T>
     {
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8,T9> LeftJoin<T9>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8,T9, bool>> joinExpression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8,T9> InnerJoin<T9>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8,T9, bool>> joinExpression);
+
         #region Where
         new ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8> Where(Expression<Func<T, T2, bool>> expression);
@@ -886,6 +909,9 @@ namespace SqlSugar
     #region 9-12
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> : ISugarQueryable<T>
     {
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> LeftJoin<T10>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9,T10, bool>> joinExpression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> InnerJoin<T10>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, bool>> joinExpression);
+
         #region Where
         new ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9> Where(Expression<Func<T, T2, bool>> expression);
@@ -977,6 +1003,9 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> : ISugarQueryable<T>
     {
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> LeftJoin<T11>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10,T11, bool>> joinExpression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> InnerJoin<T11>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, bool>> joinExpression);
+
         #region Where
         new ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10> Where(Expression<Func<T, T2, bool>> expression);
@@ -1073,6 +1102,9 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> : ISugarQueryable<T>
     {
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11,T12> LeftJoin<T12>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11,T12, bool>> joinExpression);
+        ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11,T12> InnerJoin<T12>(Expression<Func<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11,T12, bool>> joinExpression);
+
         #region Where
         new ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Where(Expression<Func<T, T2, bool>> expression);
@@ -1174,6 +1206,7 @@ namespace SqlSugar
     }
     public partial interface ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> : ISugarQueryable<T>
     {
+
         #region Where
         new ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Where(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Where(Expression<Func<T, T2, bool>> expression);
diff --git a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/SqlSugarForCore.nuspec b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/SqlSugarForCore.nuspec
index 19977161d..9e556d20b 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/SqlSugarForCore.nuspec
+++ b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/SqlSugarForCore.nuspec
@@ -2,7 +2,7 @@
 <package >
   <metadata>
     <id>SqlSugarCore</id>
-    <version>5.0.4.1-perview-02</version>
+    <version>5.0.4.1-perview-03</version>
     <authors>sunkaixuan</authors>
     <owners>Landa</owners>
     <licenseUrl>http://www.apache.org/licenses/LICENSE-2.0.html</licenseUrl>
diff --git a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/SqlSugarForCoreNoDrive.nuspec b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/SqlSugarForCoreNoDrive.nuspec
index 01725c58b..17e64f4c0 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/SqlSugarForCoreNoDrive.nuspec
+++ b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/SqlSugarForCoreNoDrive.nuspec
@@ -2,7 +2,7 @@
 <package >
   <metadata>
     <id>SqlSugarCoreNoDrive</id>
-    <version>5.0.4.1-perview-02</version>
+    <version>5.0.4.1-perview-03</version>
     <authors>sunkaixuan</authors>
     <owners>Landa</owners>
     <licenseUrl>http://www.apache.org/licenses/LICENSE-2.0.html</licenseUrl>
diff --git a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Utilities/ErrorMessage.cs b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Utilities/ErrorMessage.cs
index 41c710b6f..a72192ca0 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Utilities/ErrorMessage.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Utilities/ErrorMessage.cs
@@ -45,8 +45,8 @@ namespace SqlSugar
         {
             List<string> formatArgs = new List<string>() { enMessage, cnMessage };
             formatArgs.AddRange(args);
-            return string.Format(@"English Message : {0}
-Chinese Message : {1}", formatArgs.ToArray());
+            return string.Format(@"中文提示 : {1}
+Chinese Message : {0}", formatArgs.ToArray());
         }
     }
 }