1950年5月9日，我国与瑞典建立外交关系。
May 9, 1950, China and Sweden established diplomatic relations.
1983年5月9日，我国加入《南极条约》。
May 9, 1983, China joined the Antarctic Treaty.
2003年5月9日，国务院公布施行《突发公共卫生事件应急条例》。
May 9, 2003, the Regulation on Public Health Emergency Response was promulgated by the State Council and came into force as of the date of promulgation.
