Date of Birth: 
Place of Birth: Singapore
About Constance Lien
- Tian En Constance Lien (born 24 June 1999) is a Singaporean female ju-jitsu practitioner who also formerly trained the sport of swimming.
- Her sister Charity Lien is a swimmer who has represented Singapore in swimming meets and her mother Yuen Shuang Ching was also a national swimmer.She represented Singapore at the 2018 Asian Games and claimed a silver medal in the women's 62kg ne-waza event.
- She was the only medalist for Singapore in ju-jitsu at the 2018 Asian Games as she was the first Singaporean ever to claim an international medal in the sport of ju-jitsu.Lien also won a gold medal in the women's 62kg ne-waza event at the 2019 Southeast Asian Games.
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