diff --git a/.gitignore b/.gitignore
index 6e771f8..798ed1f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,8 @@ target/
 # MSVC Windows builds of rustc generate these, which store debugging information
 *.pdb
 
+Cargo.lock
+**/Cargo.lock
 # RustRover
 #  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
diff --git a/Cargo.lock b/Cargo.lock
index bf12bd4..6154932 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -270,6 +270,7 @@ version = "0.1.0"
 dependencies = [
  "reqwest",
  "tokio",
+ "worldlib",
 ]
 
 [[package]]
@@ -1565,6 +1566,10 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "worldlib"
+version = "0.1.0"
+
 [[package]]
 name = "write16"
 version = "1.0.0"
diff --git a/Cargo.toml b/Cargo.toml
index 5c1f41e..83f6dc5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,3 +1,3 @@
 [workspace]
 resolver ="2"
-members =["crates/hello"]
+members =["crates/hello", "crates/worldlib"]
diff --git a/crates/hello/Cargo.toml b/crates/hello/Cargo.toml
index 795bb13..d4c0dc4 100644
--- a/crates/hello/Cargo.toml
+++ b/crates/hello/Cargo.toml
@@ -7,3 +7,4 @@ license = "MIT"
 [dependencies]
 reqwest = "0.12.15"
 tokio = { version = "1.44.2", features = ["full"] }
+worldlib ={path="../worldlib"}
diff --git a/crates/hello/src/main.rs b/crates/hello/src/main.rs
index 5e0da26..66d1991 100644
--- a/crates/hello/src/main.rs
+++ b/crates/hello/src/main.rs
@@ -6,6 +6,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
 
     println!("body:{}", body);
     println!("hello world");
+    worldlib::print_sth("this is from hello".to_string());
     Ok(())
 }
 #[allow(dead_code)]
diff --git a/crates/worldlib/Cargo.toml b/crates/worldlib/Cargo.toml
new file mode 100644
index 0000000..b06e819
--- /dev/null
+++ b/crates/worldlib/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "worldlib"
+version = "0.1.0"
+edition = "2024"
+license = "MIT"
+[dependencies]
diff --git a/crates/worldlib/src/lib.rs b/crates/worldlib/src/lib.rs
new file mode 100644
index 0000000..b2542d7
--- /dev/null
+++ b/crates/worldlib/src/lib.rs
@@ -0,0 +1,3 @@
+pub fn print_sth(s: String) {
+    println!("{}", s);
+}