First look at the platform name. The highest registered platform is the national prefix, followed by the platforms in Central China, Northwest China, Zhejiang and Tianjin, and the worst is some platforms with auspicious names.
Second, see if the products listed on the official website Stock Exchange are oily. At present, there is no oil in trading products of many small platforms, but there is oil in trading software. To put it bluntly, it is to sell dog meat by hanging sheep's head.
For precious metals, at present, only the futures exchange is located in Shanghai. If you want to do spot precious metals trading, you will basically find a member company to open a trading account in China Gold and Silver Exchange. China Gold and Silver Exchange was established 100 years ago, and it is a regular and legal spot precious metal exchange.