diff --git a/README.md b/README.md
index 766c2a2..7c539c0 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ Project or files:
 │   ├── aes_ctr_test
 │   ├── aes_gcm_crypto
 │   ├── asn1-der-test
+│   ├── bc1-btc-address
 │   ├── btc-address
 │   ├── crypto
 │   ├── crypto2-demo
@@ -306,6 +307,6 @@ Project or files:
     ├── vec.rs
     └── while.rs
 
-278 directories, 38 files
+279 directories, 38 files
 ```
 
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new file mode 100644
index 0000000..ca5c9d9
--- /dev/null
+++ b/__crypto/bc1-btc-address/Cargo.lock
@@ -0,0 +1,284 @@
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diff --git a/__crypto/bc1-btc-address/Cargo.toml b/__crypto/bc1-btc-address/Cargo.toml
new file mode 100644
index 0000000..2e50df4
--- /dev/null
+++ b/__crypto/bc1-btc-address/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "bc1-btc-address"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+bitcoin = "0.32.6"
+hex = "0.4.3"
+rand = "0.9.1"
diff --git a/__crypto/bc1-btc-address/src/main.rs b/__crypto/bc1-btc-address/src/main.rs
new file mode 100644
index 0000000..ff478a0
--- /dev/null
+++ b/__crypto/bc1-btc-address/src/main.rs
@@ -0,0 +1,29 @@
+use bitcoin::key::Secp256k1;
+use bitcoin::{Address, CompressedPublicKey, Network, PrivateKey};
+use rand::RngCore;
+
+// generate btc address:
+// https://coinb.in/#newSegWit
+fn main() {
+    let secp = Secp256k1::new();
+    let mut sk_bytes = [0u8; 32];
+    rand::rng().fill_bytes(&mut sk_bytes);
+    let secret_key = PrivateKey::from_slice(&sk_bytes, Network::Bitcoin).unwrap();
+
+    // let secret_key = PrivateKey::from_wif("L2HajtedHgDT16o3Er8L8tyRrPNbXkeBK69vhGi7K9eK4Yg3dJuj").unwrap();
+
+    let public_key = secret_key.public_key(&secp);
+    let compress_public_key = CompressedPublicKey::try_from(public_key).unwrap();
+
+    // 构造 P2WPKH 地址 (bc1 开头)
+    let address = Address::p2wpkh(&compress_public_key, Network::Bitcoin);
+    let address = address.to_string();
+
+    println!("Private Key (WIF): {}", secret_key.to_wif());
+    println!("Public Key: {}", public_key);
+    println!(
+        "Public Key: {}",
+        hex::encode(&public_key.inner.serialize_uncompressed())
+    );
+    println!("SegWit Address (bc1): {}", address);
+}