diff --git a/Cargo.toml b/Cargo.toml
index 15f94f3..4d04194 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,6 +19,11 @@ rsa = "0.9.6"
 serde = { version = "1.0.196", features = ["derive"] }
 serde_json = "1.0.113"
 serde_repr = "0.1.18"
+sqlx = { version = "0.7.3", features = [
+    "sqlx-sqlite",
+    "sqlite",
+    "runtime-tokio",
+] }
 structopt = "0.3.26"
 tokio = { version = "1.36.0", features = ["full"] }
 tracing = "0.1.40"
diff --git a/README.md b/README.md
index 682045e..604242e 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # sdlan rust版本
 rust版本的sdlan。
 
-* [protocol](./docs/protocol.md)
\ No newline at end of file
+* [protocol](./docs/protocol.md)
+* [design](./docs/design.md)
\ No newline at end of file
diff --git a/docs/design.md b/docs/design.md
new file mode 100644
index 0000000..6c39bb3
--- /dev/null
+++ b/docs/design.md
@@ -0,0 +1,17 @@
+# sdlan-sn设计
+服务端为单体应用，多个服务端可以同时启动，后面的服务端启动时，可以指定`--fedration x.x.x.x:7655,y.y.y.y:7656`命令行参数来指定其他的服务端，服务端将其他服务端的信息保存在`fedration`这个network里面。
+
+比如有如下的结构：
+
+```mermaid
+graph TD
+    A[服务端1]
+    B[服务端2]
+    C[节点1]
+    D[节点2]
+    A .- B
+    A --- C
+    B --- D
+```
+
+服务端1和服务端2通过udp连接，现在分别有个节点连接到对应的服务端，
\ No newline at end of file
diff --git a/scripts/mysql.md b/scripts/mysql.md
new file mode 100644
index 0000000..099508d
--- /dev/null
+++ b/scripts/mysql.md
@@ -0,0 +1,11 @@
+# mysql操作记录
+```shell
+# 添加用户
+CREATE USER 'username'@'host' IDENTIFIED BY 'password';
+
+# 授权
+GRANT ALL PRIVILEGES ON db.* TO 'username'@'host';
+
+# 刷新权限
+FLUSH ALL PRIVILEGES;
+```
\ No newline at end of file
diff --git a/src/bin/sdlan-sn/utils/sn.rs b/src/bin/sdlan-sn/utils/sn.rs
index 04a6c93..1fa061e 100644
--- a/src/bin/sdlan-sn/utils/sn.rs
+++ b/src/bin/sdlan-sn/utils/sn.rs
@@ -36,7 +36,7 @@ pub struct SuperNode {
     pub daemon: bool,
 
     // 本地监听的udp端口号
-    pub local_port: i16,
+    pub local_port: u16,
 
     // 该SuperNode包含的所有的网络
     // 在云端创建或者删除网络的时候，需要通知sn修改这个网络信息
@@ -61,7 +61,7 @@ pub struct SuperNode {
 }
 
 impl SuperNode {
-    pub fn new(sock: UdpSocket) -> Self {
+    pub fn new(sock: UdpSocket, localport: u16) -> Self {
         let now = SystemTime::now();
         println!("now: {:?}", now);
         let start_time = now
@@ -80,7 +80,7 @@ impl SuperNode {
         Self {
             start_time,
             daemon: false,
-            local_port: 7655,
+            local_port: localport,
             networks: MyDashMap::new(),
             fedration: Network::new("*fedration", gen_uuid(), true, 0, 0),
             pending: Network::new("*pending", gen_uuid(), false, 0, 0),