Tan Kok Wai (simplified Chinese: 陈国伟; traditional Chinese: 陳國偉; pinyin: Chén Guówěi; Pe̍h-ōe-jī: Tân Kok-uí)born 7 October 1957 in Sepang New Village, Selangor) is a Malaysian politician who served as Special Envoy to the Prime Minister to China in the Pakatan Harapan (PH) administration under former Prime Minister Mahathir Mohamad from August 2018 to March 2020. He has served as the Member of Parliament (MP) for Cheras since April 1995 and for Sungai Besi from August 1986 to April 1995. He is a member of the Democratic Action Party (DAP), a component party of the PH opposition coalition. He has served as the Advisor of DAP since March 2022, National Chairman of DAP from March 2014 to March 2022 and Chairman of PH of Kuala Lumpur since August 2017.