diff --git a/scripts/check_api_cn.sh b/scripts/check_api_cn.sh
index 9725e762b242c9865e65600ca1d0e5c5fffdcce5..a986d39469024293436395fa681e239a680c79b1 100644
--- a/scripts/check_api_cn.sh
+++ b/scripts/check_api_cn.sh
@@ -7,9 +7,8 @@ if [ "$night" == "develop" ];then
    wget -q https://paddle-wheel.bj.bcebos.com/0.0.0-gpu-cuda9-cudnn7-mkl/paddlepaddle_gpu-0.0.0-cp27-cp27mu-linux_x86_64.whl
    pip install -U paddlepaddle_gpu-0.0.0-cp27-cp27mu-linux_x86_64.whl
 else
-   git clone https://github.com/PaddlePaddle/Paddle.git
-   mkdir Paddle/build && cd Paddle/build
-   cmake .. -DWITH_GPU=ON -DWITH_COVERAGE=OFF -DWITH_TESTING=OFF -DCMAKE_BUILD_TYPE=Release
+   cd Paddle/build
+   cmake .. -DWITH_GPU=ON  -DWITH_COVERAGE=OFF -DWITH_TESTING=OFF -DCMAKE_BUILD_TYPE=Release
    make -j`nproc`
    pip install -U python/dist/paddlepaddle_gpu-0.0.0-cp27-cp27mu-linux_x86_64.whl 
 fi
diff --git a/scripts/start.sh b/scripts/start.sh
index 2866633991d8a7d7f68d2079a835fd09e7a429f6..fff346a3e679bd9145c164c7b2c4aaf88c7b58a4 100755
--- a/scripts/start.sh
+++ b/scripts/start.sh
@@ -7,7 +7,7 @@ if [ $? -ne 0 ];then
   echo "code format error"
   exit 1
 fi
-/bin/bash  ${DIR_PATH}/scripts/check_api_cn.sh
+/bin/bash -x ${DIR_PATH}/scripts/check_api_cn.sh
 if [ $? -ne 0 ];then
   exit 1
 fi