FAP, May 10 (FAP)-- the tail gas control plate strengthened in early trading, with Kailong Hi-Tech and Ecolan rising more than 10%, and Ofu Environmental Protection, Wanyi Technology, Sifang Optoelectronics and so on. In the news, the Ministry of Industry and Information Technology and other five departments announced a ban on the production, import and sale of cars that do not meet stage 6b of the sixth national emission standard from July 1.