diff --git a/docs/en/guides/How-to-build.md b/docs/en/guides/How-to-build.md
index 25059cedbccb3ef9092c292aceab85ed96059bd4..3e516bf0bdbead7152c87dd5fcfffad3dd558aa5 100644
--- a/docs/en/guides/How-to-build.md
+++ b/docs/en/guides/How-to-build.md
@@ -14,7 +14,11 @@ This document helps people to compile and build the project in your maven and se
 1. Run `./mvnw clean package -DskipTests`
 1. All packages are in `/dist`.(.tar.gz for Linux and .zip for Windows).
 
-### Build from Apache source codes
+### Build from Apache source code release
+- What is `Apache source code release`?
+
+For each official Apache release, there is a complete and independent source code tar, which is including all source codes. You could download it from [SkyWalking Apache download page](http://skywalking.apache.org/downloads/). No git related stuff required when compiling this. Just follow these steps.
+
 1. Prepare JDK8 and maven3
 1. Run `./mvnw clean package -DskipTests`
 1. All packages are in `/dist`.(.tar.gz for Linux and .zip for Windows).