diff --git a/README.md b/README.md
index f0782b2..8e26a1c 100644
--- a/README.md
+++ b/README.md
@@ -6,10 +6,8 @@ This is the main repository for Colgm compiler.
 
 ## Repo Content
 
-- [Bootstrap](./bootstrap/README.md) -> bootstrap
-  - still under development
-- [Bootstrapped [WIP]](./src/README.md) -> src
-  - for bootstrap test, not useful
+- [bootstrap](./bootstrap/README.md): still under development
+- [src](./src/README.md): for bootstrapped compiler, not available now
 
 ## Bootstrapping Compiler
 
diff --git a/src/README.md b/src/README.md
index f9793c7..43e9e22 100644
--- a/src/README.md
+++ b/src/README.md
@@ -1,6 +1,6 @@
 # <img src="../doc/colgm.svg" height="50px"/> Colgm Compiler
 
-WIP. The compiled `.ll` file maybe malfunction.
+Work in progress.
 
 ## Build
 
@@ -9,3 +9,20 @@ First you need bootstrap compiler, then use this command:
 ```bash
 [path of the compiler] main.colgm -L .
 ```
+
+And `out.ll` is generated, try `lli` or `clang`.
+
+## Run
+
+for `lli`(maybe crash on macOS, don't know why):
+
+```bash
+lli out.ll main.colgm -l -a
+```
+
+for `clang`:
+
+```bash
+clang out.ll -o colgm
+./colgm main.colgm -l -a
+```