When diagnosed with Alzheimer's disease in 2009, Chen handed over control of his Business to his younger daughter Vivien Chen, who had been part of the Business since 1981. In 2010, his wife Yang Foo Oi and elder daughter Angela, a trained Architect who lived in the United States and now in Hong Kong, sued younger daughter Vivian, alleging that Chen was misled into transferring assets to a trust fund controlled by Vivian. Yang divorced him in 2011.