To Chung is a "single dad" of 20,000 children. He is the founder of the Chi Heng Foundation, an organization aimed at supporting children with HIV/AIDS, and believes that giving practical help to families affected by the disease is more important than writing checks or handing over money. Why did To Chung give up his Wall Street career and become a social philanthropist? Find out with Minds of China: December 18th-25th, 1015-1030, 1415-1430, 2045-2100 and 0315-0330 (next day) BJT (GMT+8).