diff --git a/APP_Framework/Applications/app_test/test_ftpclient/ftp_client/ftp_client.c b/APP_Framework/Applications/app_test/test_ftpclient/ftp_client/ftp_client.c
index 805768f1c..ff567dfc1 100644
--- a/APP_Framework/Applications/app_test/test_ftpclient/ftp_client/ftp_client.c
+++ b/APP_Framework/Applications/app_test/test_ftpclient/ftp_client/ftp_client.c
@@ -10,6 +10,18 @@
 #include "lwip/sockets.h"
 #include "lwip/netdb.h"
 
+static pthread_mutex_t *mutex;
+
+int ftp_init()
+{
+    return PrivMutexCreate(mutex, NULL);
+}
+
+int ftp_close()
+{
+    return PrivMutexDelete(mutex);
+}
+
 /**
  * @description: Send a cmd to FTP server
  * @param socket - Control socket
@@ -19,7 +31,7 @@
  * @param other - Store output parameter if needed
  * @return 0: success; others: failure
  */
-static int ftp_cmd(int socket, int wait_time, int cmd, char *param, int *other)
+int ftp_cmd(int socket, int wait_time, int cmd, char *param, int *other)
 {
     fd_set readset;
     struct timeval timeout;
@@ -124,8 +136,8 @@ static int ftp_cmd(int socket, int wait_time, int cmd, char *param, int *other)
 
     /* Waiting for server response */
     if (select(socket + 1, &readset, NULL, NULL, &timeout) <= 0) {
-        LOG_I("select the socket timeout!\n");
-        return -1;
+    LOG_I("select the socket timeout!\n");
+    return -1;
     }
 
     /* Wait and receive the packet back from the server. */
@@ -141,7 +153,7 @@ static int ftp_cmd(int socket, int wait_time, int cmd, char *param, int *other)
         ++i;
     }
     buff[i + 1] = '\0';
-    LOG_I("Recv:%s\n", buff);
+    // LOG_I("Recv:%s\n", buff);
 
     /* Identify if the status code is correct according to cmd */
     switch (cmd)
@@ -308,8 +320,9 @@ static int ftp_cmd(int socket, int wait_time, int cmd, char *param, int *other)
  * @param getlen - Actual length of data received
  * @return 0: success; others: failure
  */
-static int ftp_downloaddata(int socket, int wait_time, char *buf, int bufsize, int *getlen)
+int ftp_downloaddata(int socket, int wait_time, char *buf, int bufsize, int *getlen)
 {
+    memset(buf, 0, bufsize);
     fd_set readset;
     struct timeval timeout;
     int len = 0;
@@ -345,7 +358,7 @@ static int ftp_downloaddata(int socket, int wait_time, char *buf, int bufsize, i
  * @param getlen - Actual length of data sended
  * @return 0: success; others: failure
  */
-static int ftp_uploaddata(int socket, char *buf, int bufsize, int *getlen)
+int ftp_uploaddata(int socket, char *buf, int bufsize, int *getlen)
 {
     int len = 0;
     
@@ -451,13 +464,12 @@ __exit:
 int ftp_downloadfile(ftp_client *ftp, char *file_name)
 {
     int ret = 0, fd = 0;
-    struct addrinfo hints, *result = NULL, *cur = NULL;
     int getlen = 0;
     int file_pos = 0;
     int port = 0;
     int file_size = 0;
 
-    char filebuf[128] = {0};
+    char filebuf[256] = {0};
 
     /* Enter the pasv mode */
     if (ftp_cmd(ftp->control_socket, 10000, PASV, NULL, &port) != 0) {
@@ -466,32 +478,19 @@ int ftp_downloadfile(ftp_client *ftp, char *file_name)
     }
 
     /* Creat the data socket link */
-    memset(&hints, 0, sizeof(hints));
-    hints.ai_family = AF_UNSPEC;
-    hints.ai_socktype = SOCK_STREAM;
-    hints.ai_protocol = IPPROTO_TCP;
+    fd = socket(AF_INET, SOCK_STREAM, 0);
+    int bufsize = 1024 * 1024;
+    setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &bufsize, sizeof(bufsize));
     
     sprintf(ftp->data_port, "%d", port);
+    struct sockaddr_in server_addr;
+    memset(&server_addr, 0, sizeof(server_addr));
+    server_addr.sin_family = AF_INET;
+    server_addr.sin_port = htons(port);
+    server_addr.sin_addr.s_addr = inet_addr(ftp->server_ip);
 
-    /* Do name resolution with both IPv6 and IPv4 */
-    if (getaddrinfo(ftp->server_ip, ftp->data_port, &hints, &result) != 0) {
-        goto __exit;
-    }
-    
-    for (cur = result; cur != NULL; cur = cur->ai_next) {
-        fd = socket(cur->ai_family, cur->ai_socktype, cur->ai_protocol);
-        if (fd < 0) {
-            continue;
-        }
-
-        if (connect(fd, cur->ai_addr, cur->ai_addrlen) == 0) {
-            ftp->data_socket = fd;
-            break;
-        }
-        closesocket(fd);
-        
-    }
-    freeaddrinfo(result);
+    if (connect(fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == 0)
+        ftp->data_socket = fd;
 
     if(ftp->data_socket < 0)
     {
@@ -505,6 +504,30 @@ int ftp_downloadfile(ftp_client *ftp, char *file_name)
         goto __exit;
     }
 
+    char name[64];
+    sprintf(name, "/%s", file_name);
+    int f = PrivOpen(name, O_RDWR|O_CREAT);
+    /* Read the file */
+    while(1) {
+        if (ftp_downloaddata(ftp->data_socket, 10000, filebuf, 128, &getlen) == 0) {
+            if (getlen) {
+                PrivMutexObtain(mutex);
+                ret = PrivWrite(f, filebuf, strlen(filebuf));
+                PrivMutexAbandon(mutex);
+                if (ret < 0) {
+                    break;
+                }
+            } else {
+                break;
+            }
+        } else {
+            break;
+        }
+        file_pos = file_pos + getlen;
+    }
+    printf("Total length: %d\n", file_pos); // Compare the size of the file previously returned by the server
+    PrivClose(f);
+
     /* Waite the download file finish */
     if (ftp_cmd(ftp->control_socket, 10000, FINISH, NULL, NULL) != 0) {
         ret = -1;
@@ -512,30 +535,6 @@ int ftp_downloadfile(ftp_client *ftp, char *file_name)
         ret = 0;
     }
 
-    char name[64];
-    sprintf(name, "/%s", file_name);
-    int f = PrivOpen(name, O_RDWR|O_CREAT);
-    /* Read the file */
-    while(file_size > file_pos) {
-        if (ftp_downloaddata(ftp->data_socket, 10000, filebuf, 128, &getlen) == 0) {
-            if (getlen) {
-                ret = PrivWrite(f, filebuf, strlen(filebuf));
-                if (ret < 0) {
-                    printf("write failed,error:%d\n", ret);
-                    goto __exit;
-                }
-            } else {
-                ret = -1;
-                goto __exit;
-            }
-        } else {
-            ret = -1;
-            goto __exit;
-        }
-        file_pos = file_pos + getlen;
-    }
-    printf("Total length: %d\n", file_pos); // Compare the size of the file previously returned by the server
-    PrivClose(f);
 __exit:
     if(ftp->data_socket >= 0)
     {
@@ -569,32 +568,19 @@ int ftp_uploadfile(ftp_client *ftp, char *file_name)
     }
 
     /* Creat the data socket link */
-    memset(&hints, 0, sizeof(hints));
-    hints.ai_family = AF_UNSPEC;
-    hints.ai_socktype = SOCK_STREAM;
-    hints.ai_protocol = IPPROTO_TCP;
-
-    sprintf(ftp->data_port, "%d", port);
-
-    /* Do name resolution with both IPv6 and IPv4 */
-    if (getaddrinfo(ftp->server_ip, ftp->data_port, &hints, &result) != 0) {
-        goto __exit;
-    }
+    fd = socket(AF_INET, SOCK_STREAM, 0);
+    int bufsize = 1024 * 1024;
+    setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &bufsize, sizeof(bufsize));
     
-    for (cur = result; cur != NULL; cur = cur->ai_next) {
-        fd = socket(cur->ai_family, cur->ai_socktype, cur->ai_protocol);
-        if (fd < 0) {
-            continue;
-        }
+    sprintf(ftp->data_port, "%d", port);
+    struct sockaddr_in server_addr;
+    memset(&server_addr, 0, sizeof(server_addr));
+    server_addr.sin_family = AF_INET;
+    server_addr.sin_port = htons(port);
+    server_addr.sin_addr.s_addr = inet_addr(ftp->server_ip);
 
-        if (connect(fd, cur->ai_addr, cur->ai_addrlen) == 0) {
-            ftp->data_socket = fd;
-            break;
-        }
-        closesocket(fd);
-        
-    }
-    freeaddrinfo(result);
+    if (connect(fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == 0)
+        ftp->data_socket = fd;
 
     if(ftp->data_socket < 0)
     {
@@ -619,28 +605,21 @@ int ftp_uploadfile(ftp_client *ftp, char *file_name)
     while((ret = PrivRead(f, filebuf, 128)) != 0) {
         if (ret < 0) {
             printf("read failed.\n");
-            goto __exit;
+            break;
         }
         if (ftp_uploaddata(ftp->data_socket, filebuf, ret, &getlen) == 0) {
             if (!getlen) {
                 ret = -1;
-                goto __exit;
+                break;
             }
         } else {
             ret = -1;
-            goto __exit;
+            break;
         }
-        file_pos = file_pos + getlen;
+        file_pos += getlen;
     }
     printf("Total length: %d\n", file_pos);
 
-    /* Uploading a file requires the client to actively close the socket. */
-    if(ftp->data_socket >= 0)
-    {
-        closesocket(ftp->data_socket);
-        ftp->data_socket = -1;
-    }
-
     /* Waite the upload file finish */
     if (ftp_cmd(ftp->control_socket, 10000, FINISH, NULL, NULL) != 0) {
         ret = -1;
diff --git a/APP_Framework/Applications/app_test/test_ftpclient/ftp_client/ftp_client.h b/APP_Framework/Applications/app_test/test_ftpclient/ftp_client/ftp_client.h
index 83663f02d..c58e1ac03 100644
--- a/APP_Framework/Applications/app_test/test_ftpclient/ftp_client/ftp_client.h
+++ b/APP_Framework/Applications/app_test/test_ftpclient/ftp_client/ftp_client.h
@@ -34,6 +34,8 @@ typedef struct ftp_client_struct
     int            data_socket;
 }ftp_client;
 
+int ftp_init();
+int ftp_close();
 ftp_client *ftp_login(char *addr, char *username, char *password);
 int ftp_downloadfile(ftp_client *ftp, char *file_name);
 int ftp_uploadfile(ftp_client *ftp, char *file_name);
diff --git a/APP_Framework/Applications/app_test/test_ftpclient_final/README.md b/APP_Framework/Applications/app_test/test_ftpclient_final/README.md
index 364143051..f44f0ea54 100644
--- a/APP_Framework/Applications/app_test/test_ftpclient_final/README.md
+++ b/APP_Framework/Applications/app_test/test_ftpclient_final/README.md
@@ -36,6 +36,8 @@ typedef struct ftp_client_struct
 
 ### FTP server
 
+FTP server 的代码托管在 https://github.com/JasenChao/ftp_server.git 。
+
 FTP server设计为：
 
 ```c
@@ -78,9 +80,7 @@ typedef struct _ftp_server
 
 3. 将开发板与路由器连接，根据实际情况修改代码中的网卡配置部分，使得开发板可以上网。
 
-4. `TestFtpClientFinal` 命令需要一个参数，参数可选 `upload` 和 `download`，分别会启动 10 个线程，进行文件名拼接，然后登陆到 FTP server，进行对应文件的上传/下载。注意需要将测试程序中 `ftp_login` 的 server ip、用户名以及密码替换为实际情况的内容。
-
-5. 关闭 FTP client。
+4. `TestFtpClientFinal` 命令需要一个参数，参数可选 `init`、`close`、`upload`、`download`，分别会初始化和关闭FTP，启动 10 个线程，进行文件名拼接，然后登陆到 FTP server，进行对应文件的上传/下载。注意需要将测试程序中 `ftp_login` 的 server ip、用户名以及密码替换为实际情况的内容。
 
 ## 4. 运行结果（需结合运行测试截图按步骤说明）
 
@@ -96,28 +96,30 @@ typedef struct _ftp_server
 
     ![fig2](fig2.png)
 
-5. 执行 `TestFtpClientFinal download` 命令，10 个线程并发创建 10 个 client 下载对应的 10 个文件，可以看到下载过程是并发进行的。
+5. 执行 `TestFtpClientFinal init` 命令，初始化网卡和互斥量。
 
     ![fig3](fig3.png)
+
+6. 执行 `TestFtpClientFinal download` 命令，10 个线程并发创建 10 个 client 下载对应的 10 个文件，可以看到下载过程是并发进行的。
+
     ![fig4](fig4.png)
     ![fig5](fig5.png)
+
+7. 执行 `ls` 命令，看到文件全部下载成功，大小与 server 一致。
+
     ![fig6](fig6.png)
 
-6. 执行 `ls` 命令，看到文件全部下载成功，大小与 server 一致。
-
-    ![fig7](fig7.png)
-
-7. 在 server 端执行 `rm file_*` 命令，删除服务器端的测试文件。
+8. 在 server 端执行 `rm file_*` 命令，删除服务器端的测试文件。
 
 8. 执行 `TestFtpClientFinal upload` 命令，10 个线程并发创建 10 个 client 上传刚刚下载的 10 个文件，可以看到上传过程是并发进行的。
 
+    ![fig7](fig7.png)
     ![fig8](fig8.png)
     ![fig9](fig9.png)
     ![fig10](fig10.png)
+
+9. 在 server 端执行 `ll --block-size=1` 命令，可以看到文件全部重新上传，时间与之前删除的相比有变化，大小与之前一致，通过打开比对可以发现内容也一致。
+
     ![fig11](fig11.png)
 
-9. 在 server 端执行 `ll --block-size=1` 命令，可以看到文件全部重新上传，大小与之前一致。
-
-    ![fig12](fig12.png)
-
 10. 测试结束。
\ No newline at end of file
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index b9668a777..97ecc2b1b 100644
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diff --git a/APP_Framework/Applications/app_test/test_ftpclient_final/fig9.png b/APP_Framework/Applications/app_test/test_ftpclient_final/fig9.png
index 37461ac52..e40c5ee75 100644
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diff --git a/APP_Framework/Applications/app_test/test_ftpclient_final/test_ftpclient_final.c b/APP_Framework/Applications/app_test/test_ftpclient_final/test_ftpclient_final.c
index bc348b51b..7c6836d00 100644
--- a/APP_Framework/Applications/app_test/test_ftpclient_final/test_ftpclient_final.c
+++ b/APP_Framework/Applications/app_test/test_ftpclient_final/test_ftpclient_final.c
@@ -42,14 +42,14 @@ void TestFtpClientFinal(int argc, char *argv[]) {
 
     pthread_attr_t attr;
     attr.schedparam.sched_priority = 22;
-    attr.stacksize = 4096;
+    attr.stacksize = 2048;
 
     memset(f, 0, sizeof(f));
 
     /* Initialize the network IP */
     char self_ipaddr[] = {192, 168, 130, 77};
     char self_netmask[] = {255, 255, 254, 0};
-    char self_gwaddr[] = {192, 168, 130, 1};
+    char self_gwaddr[] = {192, 168, 130, 78};
     lwip_config_tcp(0, self_ipaddr, self_netmask, self_gwaddr);
 
     if (strcmp(argv[1], "upload") == 0) {
@@ -64,6 +64,10 @@ void TestFtpClientFinal(int argc, char *argv[]) {
             pthread_t down;
             PrivTaskCreate(&down, &attr, &downloadfunc, &i);
         }
+    } else if (strcmp(argv[1], "init") == 0) {
+        ftp_init();
+    } else if (strcmp(argv[1], "close") == 0) {
+        ftp_close();
     }
 }
 PRIV_SHELL_CMD_FUNCTION(TestFtpClientFinal, 2023 open source contest final 1 st issue3, PRIV_SHELL_CMD_MAIN_ATTR);
\ No newline at end of file