On November 27th,  Dongguan Investment Group Co., Ltd. Weiguo Huang president leading the team and the president of the Dongguan Green Building Association Jianjun Deng, President Jinxian Lu of the HVAC Industry Association of Dongguan, and Liu Shengjun, Dongguan Science and Technology Finance Group Co., Ltd., General Manager, Jun Wang, Chairman of Shenzhen Guohua Investment Management Corp., Ltd., and General Manager Zhengjie Liang, Dongguan Dihao Group Co., Ltd., came to Air Guard Purification Technology Group to conduct in-depth inspections and exchanges. The chairman Wu Zhang give a enthusiastic reception with senior officials of the company.