Nina Wang, also known as Nina Wang Kung Yu-sum, was the late chairwoman of Chinachem Group and Asia's richest woman. Born in September 1937, she took over Chinachem after her husband Teddy was mysteriously kidnapped in 1990 and built it into a major property developer. Teddy was never found and was declared dead in 1999. Wang died of cancer in 2007 with an estimated net worth of US$4.2 billion. Her will has been the subject of a court battle after her personal feng shui guru, Tony Chan, was accused of forging it in his favour.