diff --git a/README.md b/README.md
index d87843080c4d3de0e8785c541d6b2714af61df4e..c821bdc031fc3125e7afdfd2f8a9c2878e51f505 100644
--- a/README.md
+++ b/README.md
@@ -129,6 +129,17 @@ mkdir debug && cd debug
 cmake .. && cmake --build .
 ```
 
+Note TDengine 2.3.0.0 and later use a component named 'blm3' to play http daemon role by default instead of the http daemon embedded in the early version of TDengine. The blm3 is programmed by go language. If you pull TDengine source code to the latest from an existing codebase, please execute 'git submodule update --init --recursive' to pull blm3 source code. Please install go language 1.14 or above for compiling blm3. If you meet difficulties regarding 'go mod', especially you are from China, you can use a proxy to solve the problem.
+```
+go env -w GO111MODULE=on
+go env -w GOPROXY=https://goproxy.cn,direct
+```
+
+Or you can use the following command to choose to embed old httpd too.
+```
+cmake .. -DBUILD_HTTP=true
+```
+
 You can use Jemalloc as memory allocator instead of glibc:
 ```
 apt install autoconf