HONG KONG -- Hopu Investment Management Co., along with two Chinese firms, has signed a US$110 million deal to buy a 20% stake in Winsway Coking Coal, in another venture into Mongolia by the Chinese private-equity firm founded by top China dealmaker Fang Fenglei, people familiar with the deal said Thursday.

Winsway specializes in processing, washing and transporting coking coal and bringing resources from Mongolia to China.