diff --git a/CHANGELOG.md b/CHANGELOG.md
index cd6f79271..5ea43ec0b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,7 @@
 * 【cache  】     修复LRUCache线程安全问题（issue#1895@Github）
 * 【crypto 】     修复KeyUtil异常信息参数丢失问题（issue#1902@Github）
 * 【core   】     修复StrUtil.split和splittoArray不一致问题（issue#I4ELU5@Github）
+* 【core   】     修复SymmetricCrypto未关闭CipherOutputStream导致的问题（issue#I4EMST@Gitee）
 
 -------------------------------------------------------------------------------------------------------------
 
diff --git a/README-EN.md b/README-EN.md
index 9783a1a9f..5576237e4 100644
--- a/README-EN.md
+++ b/README-EN.md
@@ -201,13 +201,11 @@ If you think Hutool is good, you can donate to buy tshe author a pack of chili~,
 
 ## 👕shop
 
-We provide the T-Shirt with Hutool Logo, please visit the shop：
+We provide the T-Shirt and Sweater with Hutool Logo, please visit the shop：
 
 [Hutool T-Shirt](https://m.tb.cn/h.f47W8zc?sm=7d2b95)
 
-<div align="center">
-	<img src="https://cdn.jsdelivr.net/gh/looly/hutool-site/images/t_shirt.jpg">
-</div>
+[Hutool Sweater](https://m.tb.cn/h.fUM4d6B?sm=4c0a5f)
 
 ## 📌WeChat Official Account
 
diff --git a/README.md b/README.md
index f9ea97fd9..99967c3f0 100644
--- a/README.md
+++ b/README.md
@@ -202,21 +202,19 @@ Hutool欢迎任何人为Hutool添砖加瓦，贡献代码，不过维护者是
 
 如果你觉得Hutool不错，可以捐赠请维护者吃包辣条~，在此表示感谢^_^。
 
-点击以下链接，将页面拉到最下方点击“捐赠”即可。
-
 [Gitee上捐赠](https://gitee.com/dromara/hutool)
 
 [捐赠给Dromara组织](https://dromara.gitee.io/donate.html)
 
 ## 👕周边
 
-我们提供了印有Hutool Logo的主题T恤，欢迎点击购买：
+你也可以通过购买Hutool的周边商品来支持Hutool维护哦！
 
-[HutoolT恤商店](https://m.tb.cn/h.f47W8zc?sm=7d2b95)
+我们提供了印有Hutool Logo的周边商品，欢迎点击购买支持：
 
-<div align="center">
-	<img src="https://cdn.jsdelivr.net/gh/looly/hutool-site/images/t_shirt.jpg">
-</div>
+[Hutool周边商店-T恤](https://m.tb.cn/h.f47W8zc?sm=7d2b95)
+
+[Hutool周边商店-卫衣](https://m.tb.cn/h.fUM4d6B?sm=4c0a5f)
 
 ## 📌公众号
 
diff --git a/hutool-core/src/main/java/cn/hutool/core/codec/Base64.java b/hutool-core/src/main/java/cn/hutool/core/codec/Base64.java
index 1b77c2ba6..ec5b018f6 100644
--- a/hutool-core/src/main/java/cn/hutool/core/codec/Base64.java
+++ b/hutool-core/src/main/java/cn/hutool/core/codec/Base64.java
@@ -299,7 +299,7 @@ public class Base64 {
 	 * base64解码
 	 *
 	 * @param base64 被解码的base64字符串
-	 * @return 被加密后的字符串
+	 * @return 解码后的bytes
 	 */
 	public static byte[] decode(CharSequence base64) {
 		return Base64Decoder.decode(base64);
diff --git a/hutool-crypto/src/main/java/cn/hutool/crypto/symmetric/SymmetricCrypto.java b/hutool-crypto/src/main/java/cn/hutool/crypto/symmetric/SymmetricCrypto.java
index abc31d182..ba92ab553 100644
--- a/hutool-crypto/src/main/java/cn/hutool/crypto/symmetric/SymmetricCrypto.java
+++ b/hutool-crypto/src/main/java/cn/hutool/crypto/symmetric/SymmetricCrypto.java
@@ -300,9 +300,11 @@ public class SymmetricCrypto implements SymmetricEncryptor, SymmetricDecryptor,
 			throw new CryptoException(e);
 		} finally {
 			lock.unlock();
+			// issue#I4EMST@Gitee
+			// CipherOutputStream必须关闭，才能完全写出
+			IoUtil.close(cipherOutputStream);
 			if (isClose) {
 				IoUtil.close(data);
-				IoUtil.close(cipherOutputStream);
 			}
 		}
 	}
@@ -351,9 +353,11 @@ public class SymmetricCrypto implements SymmetricEncryptor, SymmetricDecryptor,
 			throw new CryptoException(e);
 		} finally {
 			lock.unlock();
+			// issue#I4EMST@Gitee
+			// CipherOutputStream必须关闭，才能完全写出
+			IoUtil.close(cipherInputStream);
 			if (isClose) {
 				IoUtil.close(data);
-				IoUtil.close(cipherInputStream);
 			}
 		}
 	}
diff --git a/hutool-crypto/src/test/java/cn/hutool/crypto/test/SmTest.java b/hutool-crypto/src/test/java/cn/hutool/crypto/test/SmTest.java
index 80c7995fe..c98dd21ee 100644
--- a/hutool-crypto/src/test/java/cn/hutool/crypto/test/SmTest.java
+++ b/hutool-crypto/src/test/java/cn/hutool/crypto/test/SmTest.java
@@ -81,4 +81,6 @@ public class SmTest {
 		String digest = hMac.digestHex(content);
 		Assert.assertEquals("493e3f9a1896b43075fbe54658076727960d69632ac6b6ed932195857a6840c6", digest);
 	}
+
+
 }
diff --git a/hutool-crypto/src/test/java/cn/hutool/crypto/test/symmetric/Sm4StreamTest.java b/hutool-crypto/src/test/java/cn/hutool/crypto/test/symmetric/Sm4StreamTest.java
new file mode 100644
index 000000000..87ec2675c
--- /dev/null
+++ b/hutool-crypto/src/test/java/cn/hutool/crypto/test/symmetric/Sm4StreamTest.java
@@ -0,0 +1,51 @@
+package cn.hutool.crypto.test.symmetric;
+
+import cn.hutool.crypto.symmetric.SM4;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+/**
+ * https://gitee.com/dromara/hutool/issues/I4EMST
+ */
+public class Sm4StreamTest {
+
+	private static final SM4 sm4 = new SM4();
+
+	private static final boolean IS_CLOSE = false;
+
+	@Test
+	@Ignore
+	public void sm4Test(){
+		String source = "d:/test/sm4_1.txt";
+		String target = "d:/test/sm4_2.data";
+		String target2 = "d:/test/sm4_3.txt";
+		encrypt(source, target);
+		decrypt(target, target2);
+	}
+
+	public static void encrypt(String source, String target) {
+		try (InputStream input = new FileInputStream(source);
+			 OutputStream out = new FileOutputStream(target)) {
+			sm4.encrypt(input, out, IS_CLOSE);
+			System.out.println("============encrypt end");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+	public static void decrypt(String source, String target) {
+		try (InputStream input = new FileInputStream(source);
+			 OutputStream out = new FileOutputStream(target)) {
+			sm4.decrypt(input, out, IS_CLOSE);
+			System.out.println("============decrypt end");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+}