How about Dalian Yunlong Chihai? It seems to be a foreign exchange company

Not reliable, it is illegal to do foreign exchange in China.

According to the provisions of the Notice on Severely Punishing Illegal Foreign Exchange Futures and Foreign Exchange Deposits (Jian Zheng Fa Zi [1994]No. 165) and the Announcement on Preventing Foreign Exchange Deposit Risks and Property Losses jointly issued by the People's Bank of China, the Ministry of Public Security of the People's Republic of China and the State Administration of Foreign Exchange on September 8, 2008, The People's Bank of China, the Bank of China Insurance Regulatory Commission, the China Securities Regulatory Commission, the State Administration of Foreign Exchange and their branches have not approved any institution to carry out or act as an agent to carry out foreign exchange deposit business in China. It is illegal for any unauthorized institution to conduct foreign exchange deposit transactions without authorization; It is also illegal for customers (units and individuals) to entrust unauthorized institutions to conduct foreign exchange deposit transactions (whether foreign currency or RMB).