Today, 45 years ago, on September 10, 1980 (August 2, 1980), the Personal Income Tax Law of the People's Republic of China was officially enforced.On September 10, 1980, the Personal Income Tax Law of the People's Republic of China was officially enforced, on January 1, 1994 the first amendment was formally enforced, on August 30, 1999 the second amendment was formally enforced, on October 27, 2005 the third amendment was formally enforced, and on June 29, 2007 the fourth amendment was formally enforced.