Hang Seng China 50 Index is a pan-China stock market index to represent the top 50 China-based companies in the stock exchanges of Hong Kong, Shanghai and Shenzhen, which covers A share (shares circulated in mainland China), H share (shares circulated in Hong Kong from the mainland China incorporated company), Red Chip (shares circulated in Hong Kong from the companies incorporated outside mainland China with state-owned background) and P Chip (shares circulated in Hong Kong from the companies with private background)