What is the relationship between Angie Chiu and Cecilia Yip?

Personal Information Stage Name: Cecilia Yip Original Name: Li GiGi English Name: Yip, Cecilia Nickname: cc Gender: Girls Day:1March 8, 963 Birthplace: Panyu, Guangdong Birthplace: Hong Kong Height: 172 Constellation: Aries Zodiac: Rabbit Education: Boya English College of Hong Kong Name: Zhao Yaya Nickname: Yaya, A Zhi English Name:. Zodiac; Horse blood type: O type sign; Scorpio height: 165cm Weight: 52kg Education: High school (graduated from Chongde English College, a Catholic school in Hong Kong); Language: Mandarin.