In the afternoon of December 4, 2018, Zeng Yanyang, the member of Standing Committee of Hengyang Municipal Committee and executive vice mayor of Hengyang City, together with a group of other people, came to HYST to supervise the safety production of the enterprises involving in hazadous chemicals production. Accompanied by the senior leaders of HYST, Ling Zhongqiu, Liu Weixing and Song Guangxin, the supervision group inspected Yingde Gas Co., Ltd. and Baida Pioneering Energy Technology Co., Ltd.