1. Datong Kangyinge Coin Collection is a company engaged in modern coin commemorative coins, commemorative banknotes, conjoined banknotes, gold and silver coins, silver dollar recycling, Moutai liquor recycling and stamp recycling. The address is located at the west of the old city wall 120 meters in Pingcheng District, Datong City.

2. Huiran Ji Ya, mainly engaged in the formal auction appraisal of antique works of art in China. The company's address is located 50 meters east of the old city wall in Datong.