diff --git a/README.md b/README.md
index d1de2a7..2dfc0fd 100644
--- a/README.md
+++ b/README.md
@@ -158,10 +158,12 @@ Project or files:
 │   ├── ngrok-demo
 │   ├── pcap
 │   ├── quinn
+│   ├── rust-rawsock-demo
 │   ├── rust_tcp
 │   ├── s2n_quic
 │   ├── socket2
 │   ├── tcp
+│   ├── tokio-kcp-demo
 │   ├── tuntapmac
 │   ├── udp_laminar
 │   └── ureq
@@ -209,6 +211,7 @@ Project or files:
 │   ├── iter
 │   ├── misc
 │   ├── ops
+│   ├── pi
 │   └── thread
 ├── __template
 │   ├── askama
@@ -284,6 +287,6 @@ Project or files:
     ├── vec.rs
     └── while.rs
 
-253 directories, 40 files
+256 directories, 40 files
 ```
 
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diff --git a/__network/tokio-kcp-demo/Cargo.toml b/__network/tokio-kcp-demo/Cargo.toml
new file mode 100644
index 0000000..85a0aec
--- /dev/null
+++ b/__network/tokio-kcp-demo/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "tokio-kcp-demo"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+byte_string = "1.0.0"
+env_logger = "0.11.3"
+log = "0.4.21"
+tokio = { version = "1.36.0", features = ["full"] }
+tokio_kcp = "0.9.6"
diff --git a/__network/tokio-kcp-demo/src/bin/client.rs b/__network/tokio-kcp-demo/src/bin/client.rs
new file mode 100644
index 0000000..1d897f6
--- /dev/null
+++ b/__network/tokio-kcp-demo/src/bin/client.rs
@@ -0,0 +1,31 @@
+use std::{net::SocketAddr, str};
+
+use env_logger::Builder;
+use log::{info, LevelFilter};
+use tokio::io::{AsyncReadExt, AsyncWriteExt, stdin};
+use tokio_kcp::{KcpConfig, KcpStream};
+
+#[tokio::main]
+async fn main() {
+    let mut builder = Builder::new();
+    builder.filter_level(LevelFilter::Debug);
+    builder.init();
+
+    let config = KcpConfig::default();
+
+    let server_addr = "127.0.0.1:3100".parse::<SocketAddr>().unwrap();
+
+    info!("connect to: {}", server_addr);
+    let mut stream = KcpStream::connect(&config, server_addr).await.unwrap();
+    info!("connected to server, please input...");
+
+    let mut buffer = [0u8; 8192];
+    let mut i = stdin();
+    loop {
+        let n = i.read(&mut buffer).await.unwrap();
+        stream.write_all(&buffer[..n]).await.unwrap();
+
+        let n = stream.read(&mut buffer).await.unwrap();
+        println!("{}", unsafe { str::from_utf8_unchecked(&buffer[..n]) });
+    }
+}
\ No newline at end of file
diff --git a/__network/tokio-kcp-demo/src/bin/server.rs b/__network/tokio-kcp-demo/src/bin/server.rs
new file mode 100644
index 0000000..7d17769
--- /dev/null
+++ b/__network/tokio-kcp-demo/src/bin/server.rs
@@ -0,0 +1,47 @@
+use std::{net::SocketAddr, time::Duration};
+
+use byte_string::ByteStr;
+use env_logger::Builder;
+use log::{debug, error, info, LevelFilter};
+use tokio::{io::{AsyncReadExt, AsyncWriteExt}, time};
+use tokio_kcp::{KcpConfig, KcpListener};
+
+#[tokio::main]
+async fn main() {
+    let mut builder = Builder::new();
+    builder.filter_level(LevelFilter::Debug);
+    builder.init();
+
+    let config = KcpConfig::default();
+
+    let server_addr = "127.0.0.1:3100".parse::<SocketAddr>().unwrap();
+    info!("listen addr: {}", server_addr);
+    let mut listener = KcpListener::bind(config, server_addr).await.unwrap();
+
+    loop {
+        let (mut stream, peer_addr) = match listener.accept().await {
+            Ok(s) => s,
+            Err(err) => {
+                error!("accept failed, error: {}", err);
+                time::sleep(Duration::from_secs(1)).await;
+                continue;
+            }
+        };
+
+        info!("accepted {}", peer_addr);
+
+        tokio::spawn(async move {
+            let mut buffer = [0u8; 8192];
+            while let Ok(n) = stream.read(&mut buffer).await {
+                debug!("recv {:?}", ByteStr::new(&buffer[..n]));
+                if n == 0 {
+                    break;
+                }
+                stream.write_all(&buffer[..n]).await.unwrap();
+                debug!("echo {:?}", ByteStr::new(&buffer[..n]));
+            }
+
+            debug!("client {} closed", peer_addr);
+        });
+    }
+}
\ No newline at end of file