Explanation

China has been a member of WTO since 11 December 2001.

 Hong Kong has been a member since 1995 (as "Hong Kong, China" since 1997) predating the People's Republic of China, which joined in 2001 after 15 years of negotiations.

WTO Formation: 1 January 1995; 28 years ago

WTO Headquarters: Centre William Rappard, Geneva, Switzerland

The WTO has 164 members and 25 observer governments