From April 16th, 2015 to 18th, professor Zhang Jianqiang and professor Li Qibin two people go to Hebei to attend ‘the 2015 Tangshan City and Southwest Jiao Tong University cooperation’ led by the vice president of the school, Zhu Jianmei's meeting. On the afternoon of April 17, under the leadership of Liu Weiwei, director of the Tangshan Research Institute,to the Tangshan City EPA,and talk with Gao Yuanyue vice director about environmental problems.