Beijing's measures on the "Atmosphere Pollution Prevention Law of the People's Republic of China" were approved on December 8th, 2000 and began to be enforced as of January 1st. 43 measures in seven chapters are publicized. Other measures publicized in 1998, 1990, 1989 and 1997 were abolished. If you want to know about the measures in detail, please read about the Chinese version.