diff --git a/Cargo.lock b/Cargo.lock
index 0df94aa..5d64668 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -123,7 +123,7 @@ dependencies = [
 
 [[package]]
 name = "taitank-safe"
-version = "0.0.1"
+version = "0.0.4"
 dependencies = [
  "cxx",
  "cxx-build",
diff --git a/Cargo.toml b/Cargo.toml
index cc86aba..4e27577 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "taitank-safe"
-version = "0.0.1"
+version = "0.0.4"
 description = "taitank in safe rust"
 include = ["/src", "README.md", "/include/safe.h", "/include/taitank/src", ".gitmodules", "build.rs"]
 license = "MIT"
diff --git a/README.md b/README.md
index e557062..73de18d 100644
--- a/README.md
+++ b/README.md
@@ -1,29 +1,44 @@
 # Taitank Safe
 
-(In Progress) Rust binding of [tencent/taitank](https:://github.com/tencent/taitank) provides safe binding to the Taitank Layout Library.
+[![License](https://img.shields.io/badge/license-MIT%20License-blue.svg)](https://opensource.org/licenses/MIT)
+[![Package version](https://img.shields.io/crates/v/taitank-safe.svg)](https://crates.io/crates/taitank-safe)
+[![Workflow](https://github.com/rustq/taitank-safe/actions/workflows/CI.yml/badge.svg)](https://github.com/rustq/taitank-safe/actions)
+
+Rust binding of [tencent/taitank](https:://github.com/tencent/taitank) provides safe binding to the layout library.
 
 ## Usage
 
 ```toml
 [dependencies]
-taitank_safe = "0.0.1"
+taitank_safe = "0.0.4"
 ```
 
 ```rust
 use taitank_safe::*;
 
 let mut root = node_create();
+
 set_width(&mut root, 100.0);
 set_height(&mut root, 100.0);
 
-let mut root_child0 = node_create();
-set_flex_grow(&mut root_child0, 1.0);
-set_flex_basis(&mut root_child0, 50.0);
-insert_child(&mut root, &mut root_child0, 0);
+layout!(&mut root);
+```
 
-let mut root_child1 = node_create();
-set_flex_grow(&mut root_child1, 1.0);
-insert_child(&mut root, &mut root_child1, 1);
+## Development
 
-layout!(&mut root);
-```
\ No newline at end of file
+```shell
+$ git clone git@github.com:rustq/taitank-safe.git
+```
+
+```shell
+$ cd taitank-safe
+```
+
+```shell
+$ cargo run --example demo
+```
+
+
+## License
+
+[MIT](https://opensource.org/licenses/MIT)
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index 0eea4af..848873b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -145,7 +145,7 @@ pub fn insert_child(node: &mut TaitankSafeNode, child: &mut TaitankSafeNode, ind
 ///
 /// ```
 /// let mut root = taitank_safe::node_create();
-/// taitank_safe::set_width(&mut root);
+/// taitank_safe::set_width(&mut root, 200.0);
 /// taitank_safe::do_layout(&mut root, std::f64::NAN, std::f64::NAN, taitank_safe::Direction::LTR);
 /// ```
 pub fn do_layout(
diff --git a/src/macros.rs b/src/macros.rs
index 3830ae4..88b668d 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -5,7 +5,7 @@
 ///
 /// ```
 /// let mut root = taitank_safe::node_create();
-/// taitank_safe::set_width(&mut root);
+/// taitank_safe::set_width(&mut root, 200.0);
 /// taitank_safe::layout!(&mut root);
 /// ```
 #[macro_export]