diff --git a/DEVELOPMENT b/DEVELOPMENT
index be729002..2baa45ce 100644
--- a/DEVELOPMENT
+++ b/DEVELOPMENT
@@ -1,11 +1,27 @@
-## Run story
+## Contributing Guide
+
+Contributing is welcome, if you find some bugs or have some ideas, please open an issue or submit a pull request.
+
+Please ensure that you are using clean code, follows the coding style or code organization in exists codes, and pass all tests.
+
+Please submit one PR for do one thing, this is important, that for help us to review your code more easily and push to merge fast.
+
+## Development and Testing
+
+There have a lot of UI test cases in `crates/story` folder, if you change the exists features you can run the tests is working.
+
+### Run story
+
+Use `cargo run` to run a complete story examples.
 
 ```bash
 cargo run
 ```
 
-## Run Tiles example
+### Run single example
+
+There also available some split examples, run `cargo run --example` to see the available examples.
 
 ```bash
-cargo run --example tiles
+cargo run --example table
 ```
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 00000000..c5794a6b
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "1.85"