... Protection Technology Co., Ltd is located in the Yangtze River Delt, the the largest economic center in China-- Shanghai, which owes ... the same industry. Our customers have covered Jinagsu,Zhejiang and Shanghai,and are spreading to Beijing, Shanxi, Shandong, Jilin, Liaoning ... the origin, customers come first. We will obey the enterprise ethics strictly, abide by business contract and keep our ...