Tang Weixing (Chinese: 唐韦星; born 15 January 1993) is a Chinese professional go player. He has won three international titles, with two championships in the Samsung Cup (2013, 2019) and one in the Ing Cup (2016).

Tang Weixing was born in Guiyang, Guizhou in 1993. His name is related to Go: The wei in his name, taken from his mother's surname, is a homophone of the wei in weiqi, while the xing in his name, meaning 'star', is in reference to the star points on a Go board.^[1][2] He began to learn Go when he was 5 years old. At the age of 7, he moved to Beijing with his father to further pursue his study of Go.^[1][2]

As an amateur player, he won two consecutive Chinese amateur Go championships at the 2004 and 2005 Wanbao Cup [zh].^[1][2] He was China's representative at the 2006 World Amateur Go Championship, where he finished in second place.^[3][4] He earned professional 1 dan rank that same year, at age 13.^[3]

In 2013, Tang won the 18th Samsung Cup, his first international championship, defeating Lee Sedol 2–0 in the finals. Tang, who was 3 dan at the time, was promoted to 9 dan with the victory. His win capped off a year in which Chinese players swept every major international Go tournament.^[5] He finished as the runner-up in the 19th Samsung Cup in 2014, with a 2–0 loss to the champion Kim Ji-seok.^[6]

In 2016, he won his second international title in the 8th Ing Cup, beating runner-up Park Junghwan 3–2.^[7][8] He was the 22nd Samsung Cup runner-up in 2017, with a 2–1 loss to Gu Zihao.^[9] In 2019, he defeated Yang Dingxin to win the 24th Samsung Cup, marking his seventh consecutive quarterfinals appearance, fourth finals appearance, and second title at the Samsung Cup.^[10][1] He played his sixth major international title match in the 13th Chunlan Cup in 2021, and lost 2–0 to Shin Jin-seo.^[11]

As of 1 August 2020^[12][13]

• 2006: 0 wins, 2 losses
• 2007: 11 wins, 8 losses
• 2008: 16 wins, 9 losses
• 2009: 17 wins, 11 losses
• 2010: 28 wins, 17 losses
• 2011: 29 wins, 22 losses
• 2012: 48 wins, 31 losses
• 2013: 56 wins, 30 losses
• 2014: 40 wins, 30 losses
• 2015: 34 wins, 25 losses
• 2016: 39 wins, 33 losses
• 2017: 29 wins, 27 losses
• 2018: 32 wins, 31 losses
• 2019: 17 wins, 24 losses
• 2020: 5 wins, 6 losses

• Total: 401 wins, 306 losses (56.7% winning percentage)

As of 1 August 2020^[14]

As of 1 July 2018 ^[15]

Players who have won international go titles in bold.