| Native Name Lang: | zh-hk |
| Honorific-Prefix: | The Honourable |
| Michael Tien Puk-sun | |
| Honorific-Suffix: | BBS JP |
| Office: | Member of the Legislative Council |
| Term Start: | 1 January 2022 |
| Predecessor: | New constituency |
| Constituency: | New Territories North West |
| Term Start1: | 1 October 2012 |
| Term End1: | 31 December 2021 |
| Predecessor1: | Lee Wing-tat |
| Successor1: | Constituency abolished |
| Constituency1: | New Territories West |
| Office2: | Member of the Tsuen Wan District Council |
| Term Start2: | 1 January 2012 |
| Term End2: | 31 December 2019 |
| Successor2: | Adrian Lau |
| Constituency2: | Discovery Park |
| Office3: | Chairman of the Kowloon-Canton Railway Corporation |
| Term Start3: | 24 December 2001 |
| Term End3: | 2 December 2007 |
| Birth Date: | 26 August 1950 |
| Birth Place: | Hong Kong |
| Residence: | Shouson Hill, Hong Kong |
| Parents: | Francis Tien |
| Children: | 1 son and 3 daughters |
| Spouse: | Frances Tien |
| Occupation: | Politician Businessman |
| Alma Mater: | Diocesan Boys' School Worcester Academy Cornell University Harvard Business School |
| C: | 田北辰 |
| J: | Tin4 Bak1san4 |
| P: | Tián Běichén |
Michael Tien Puk-sun (; born 26 August 1950) is a Hong Kong politician, businessman and member of the Legislative Council for New Territories North West. He is the founder and chairman of the G2000 and U2 Clothing retail chains and former chairman of the Kowloon-Canton Railway Corporation (KCRC). He was formerly a member of the Liberal Party, which was led by his elder brother, James Tien, and a member of the New People's Party.
Tien was appointed as the chairman of the Kowloon-Canton Railway Corporation (KCRC) in December 2001 amid public criticism on his predecessor, K. Y. Yeung. He proposed and implemented administrative reforms that enhanced KCRC's transparency and accountability; he regularly attended Legco meeting and explained the company's policies and decisions.[1] In 2006, Tien resigned as chairman of the KCRC due to disputes with other directors over his management style.[2]
Tien joined the Liberal Party in 2008 and became District Officer for Kowloon West. He quit the party in 2010 and started the New People's Party with Regina Ip, of which he became the deputy chairman.[3]
In the 2017 Chief Executive election, Tien supported his party chairwoman Regina Ip. He complained the election had "lost its shape" due to the increasing interference of "an invisible hand", referring to the Liaison Office. Tien inclined his support for John Tsang after Ip dropped out, although Ip endorsed Carrie Lam on the last day before the election.[4] [5] Tien eventually quit the party on 10 April with six District Councillors.[6]
In the 2019 District Council elections, Tien lost his Tsuen Wan District Council seat following a rout of pro-Beijing candidates amidst the 2019–20 Hong Kong protests.[7]
In December 2021, it was reported that Tien was eligible to vote four times in the 2021 Hong Kong legislative election, yielding 0.0328896% of the total voting value (elected seats), which is 6618 times more than the value of an average voter's total voting value.[8]
Tien attended Diocesan Boys' School and spent a year at Worcester Academy in the United States.[9] Tien has a degree in electrical engineering from Cornell University and an MBA from Harvard Business School.
According to Tien's January 2022 declaration of assets, he owns property in Hong Kong, mainland China, and the United States.[10]