diff --git a/docs/WechatTenpayV3/Advanced_EventDataSignatureVerification.md b/docs/WechatTenpayV3/Advanced_EventDataSignatureVerification.md
index 01f50532..9260b26f 100644
--- a/docs/WechatTenpayV3/Advanced_EventDataSignatureVerification.md
+++ b/docs/WechatTenpayV3/Advanced_EventDataSignatureVerification.md
@@ -6,6 +6,8 @@
 
 同样的，你既然可以利用本库提供的 `RSAUtility` 工具类自行进行签名验证，也可以通过 `CertificateManager` 尝试自动完成签名验证：
 
+注意，有关 `CertificateManager` 的具体用法，请务必阅读上方给出的相关文档。
+
 ```csharp
 bool ret = client.VerifyEventSignature(
     callbackTimestamp: "微信回调通知中的 Wechatpay-Timestamp 字段",
diff --git a/docs/WechatTenpayV3/Advanced_ResponseSignatureVerification.md b/docs/WechatTenpayV3/Advanced_ResponseSignatureVerification.md
index 370926de..48502f0a 100644
--- a/docs/WechatTenpayV3/Advanced_ResponseSignatureVerification.md
+++ b/docs/WechatTenpayV3/Advanced_ResponseSignatureVerification.md
@@ -60,6 +60,8 @@ var client = new WechatTenpayClient(options);
 你应在后台周期性地调用 `QueryCertificatesAsync()` 方法，并在解密得到证书内容后，记录到证书管理器中：
 
 ```csharp
+/* 注意：QueryCertificatesAsync() 接口返回值需解密后再存入 */
+/* 强调：存入的证书式请参考上一小节给出的 CER 证书文件示例 */
 certManager.SetCertificate("CER 证书序列号", "CER 证书内容");
 ```
 
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Utilities/AESUtility.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Utilities/AESUtility.cs
index dea4c248..40239248 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Utilities/AESUtility.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Utilities/AESUtility.cs
@@ -1,26 +1,26 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Security;
-using System.Security.Cryptography;
-using System.Text;
-
-namespace SKIT.FlurlHttpClient.Wechat.Api.Utilities
-{
-    public static class AESUtility
-    {
-        /// <summary>
-        /// 解密数据。
-        /// </summary>
-        /// <param name="keyBytes">AES 密钥字节数组。</param>
-        /// <param name="ivBytes">加密使用的初始化向量字节数组。</param>
-        /// <param name="cipherBytes">待解密数据字节数组。</param>
-        /// <returns>解密后的数据字节数组。</returns>
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Security;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace SKIT.FlurlHttpClient.Wechat.Api.Utilities
+{
+    public static class AESUtility
+    {
+        /// <summary>
+        /// 解密数据。
+        /// </summary>
+        /// <param name="keyBytes">AES 密钥字节数组。</param>
+        /// <param name="ivBytes">加密使用的初始化向量字节数组。</param>
+        /// <param name="cipherBytes">待解密数据字节数组。</param>
+        /// <returns>解密后的数据字节数组。</returns>
         public static byte[] Decrypt(byte[] keyBytes, byte[] ivBytes, byte[] cipherBytes)
-        {
-            if (keyBytes == null) throw new ArgumentNullException(nameof(keyBytes));
-            if (ivBytes == null) throw new ArgumentNullException(nameof(ivBytes));
+        {
+            if (keyBytes == null) throw new ArgumentNullException(nameof(keyBytes));
+            if (ivBytes == null) throw new ArgumentNullException(nameof(ivBytes));
             if (cipherBytes == null) throw new ArgumentNullException(nameof(cipherBytes));
 
             using (SymmetricAlgorithm aes = Aes.Create())
@@ -35,27 +35,27 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Utilities
                     cs.Read(plainBytes, 0, plainBytes.Length);
                     return plainBytes;
                 }
-            }
-        }
-
-        /// <summary>
-        /// 解密数据。
-        /// </summary>
-        /// <param name="encodingKey">经 Base64 编码后的 AES 密钥。</param>
-        /// <param name="encodingIV">经 Base64 编码后的 AES 初始化向量。</param>
-        /// <param name="encodingCipherText">经 Base64 编码后的待解密数据。</param>
-        /// <returns>解密后的文本数据。</returns>
+            }
+        }
+
+        /// <summary>
+        /// 解密数据。
+        /// </summary>
+        /// <param name="encodingKey">经 Base64 编码后的 AES 密钥。</param>
+        /// <param name="encodingIV">经 Base64 编码后的 AES 初始化向量。</param>
+        /// <param name="encodingCipherText">经 Base64 编码后的待解密数据。</param>
+        /// <returns>解密后的文本数据。</returns>
         public static string Decrypt(string encodingKey, string encodingIV, string encodingCipherText)
-        {
-            if (encodingKey == null) throw new ArgumentNullException(nameof(encodingKey));
+        {
+            if (encodingKey == null) throw new ArgumentNullException(nameof(encodingKey));
             if (encodingCipherText == null) throw new ArgumentNullException(nameof(encodingCipherText));
 
-            byte[] plainBytes = Decrypt(
-                keyBytes: Convert.FromBase64String(encodingKey),
-                ivBytes: Convert.FromBase64String(encodingIV),
-                cipherBytes: Convert.FromBase64String(encodingCipherText)
-            );
-            return Encoding.UTF8.GetString(plainBytes);
-        }
-    }
-}
+            byte[] plainBytes = Decrypt(
+                keyBytes: Convert.FromBase64String(encodingKey),
+                ivBytes: Convert.FromBase64String(encodingIV),
+                cipherBytes: Convert.FromBase64String(encodingCipherText)
+            );
+            return Encoding.UTF8.GetString(plainBytes);
+        }
+    }
+}