Hong Kong stock market will boom as Chinese mainland stock markets connects with Hong Kong, and some unicorn companies such as Xiaomi and Ant Financial are expected to list on the market.

Currently, H-share market has 661 Chinese mainland companies accounting for 30 percent of the total number of companies listed in the market, and more than a half of these companies are located in Beijing, Guangdong province and Shanghai, according to the online securities brokerage Tiger Brokers.

Tiger Brokers said the listed companies usually are the best business groups that can reflect provinces' economic strength, and the Hong Kong-listed Chinese mainland companies can showcase their locations' economic development vitality and financing internationalization.

Here are the 10 regions in Chinese mainland that have most Hong Kong-listed companies.

No 10 Henan province
Number of H-share listed companies: 15

Six provinces in central China including Henan, Shanxi, Anhui, Hunan, Hubei, Jiangxi have rich coal and nonferrous metals resources. H-share listed companies such as China Molybdenum Co and Anhui Conch Cement Co are from these areas.