Tiantongjin was not banned, but suspended, and Weicaijin was banned by the state because it became foreign gold; Tiantongjin is an imitation of the external market, so it has not been banned. Tiantongyin didn't, because the Tianjiao Exchange is a legal platform on the right track. Now that the country is gradually opening up in this respect, the return of spot gold in the later period should not be a problem.