diff --git a/README.md b/README.md
index 48cf068..1c43edf 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[中文版本使用说明](<https://github.com/Livox-SDK/Livox-SDK/blob/master/README_CN.md>)
+
 # 1 Introduction
 
 Livox SDK is the software development kit designed for all Livox products. It is developed based on C/C++ following Livox SDK Communication Protocol, and provides easy-to-use C style API. With Livox SDK, users can quickly connect to Livox products and receive point cloud data. 
@@ -41,12 +43,29 @@ In the Livox SDK directory, run the following commands to compile the project:
 ```
 git clone https://github.com/Livox-SDK/Livox-SDK.git
 cd Livox-SDK
+```
+Install apr library by:
+
+```
 sudo ./third_party/apr/apr_build.sh
+```
+
+or by:
+
+```
+sudo apt install libapr1-dev
+```
+
+then
+
+```
 cd build && cmake ..
 make
 sudo make install
 ```
+
 ### 4.1.2 Windows 7/10
+
 #### Dependencies
 Livox SDK supports Visual Studio 2015/2017 and requires install [CMake 3.0.0+](https://cmake.org/) as dependencies.  
 
diff --git a/README_CN.md b/README_CN.md
index 8731087..460b32b 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -42,12 +42,31 @@ sudo apt install cmake pkg-config
 ```
 git clone https://github.com/Livox-SDK/Livox-SDK.git
 cd Livox-SDK
+
+
+```
+安装 apr 库通过：
+
+```
 sudo ./third_party/apr/apr_build.sh
+```
+
+或者通过：
+
+```
+sudo apt install libapr1-dev
+```
+
+然后：
+
+```
 cd build && cmake ..
 make
 sudo make install
 ```
+
 ### 4.1.2 Windows 7/10
+
 #### 依赖
 Livox SDK 支持 Visual Studio 2015/2017，需要安装 [CMake 3.0.0+](https://cmake.org/) 依赖。
 
diff --git a/third_party/apr/apr_build.bat b/third_party/apr/apr_build.bat
index 50496e8..5ffece5 100644
--- a/third_party/apr/apr_build.bat
+++ b/third_party/apr/apr_build.bat
@@ -48,6 +48,18 @@ if defined VS150COMNTOOLS (
 	call "%ProgramFiles(x86)%\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat" %PLATFORM%
 ) else if exist "%ProgramFiles(x86)%\Microsoft Visual Studio\2017\BuildTools\VC\Auxiliary\Build\vcvarsall.bat" (
 	call "%ProgramFiles(x86)%\Microsoft Visual Studio\2017\BuildTools\VC\Auxiliary\Build\vcvarsall.bat" %PLATFORM%
+)
+
+if defined VS160COMNTOOLS (
+	call "%VS160COMNTOOLS%..\..\VC\Auxiliary\Build\vcvarsall.bat" %PLATFORM%
+) else if exist "%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" (
+	call "%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" %PLATFORM%
+) else if exist "%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\Build\vcvarsall.bat" (
+	call "%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\Build\vcvarsall.bat" %PLATFORM%
+) else if exist "%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat" (
+	call "%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat" %PLATFORM%
+) else if exist "%ProgramFiles(x86)%\Microsoft Visual Studio\2019\BuildTools\VC\Auxiliary\Build\vcvarsall.bat" (
+	call "%ProgramFiles(x86)%\Microsoft Visual Studio\2019\BuildTools\VC\Auxiliary\Build\vcvarsall.bat" %PLATFORM%
 ) 
 
 echo start to build.
diff --git a/third_party/apr/apr_build.sh b/third_party/apr/apr_build.sh
index 41c76cf..c1ac518 100755
--- a/third_party/apr/apr_build.sh
+++ b/third_party/apr/apr_build.sh
@@ -59,4 +59,8 @@ make install
 
 popd
 
+if [ ! -d "/usr/local/lib/pkgconfig" ]; then
+	mkdir /usr/local/lib/pkgconfig
+fi
+
 cp /usr/local/apr/lib/pkgconfig/apr-1.pc /usr/local/lib/pkgconfig/