Be careful when transferring money to your personal account. When doing foreign exchange in China, the funds are generally remitted to an enterprise account of HSBC in Hong Kong through overseas remittance. Remittance to personal account should be a black platform, so be careful.
Now doing spot gold is a 24-hour T+0 two-way transaction. The platform can look at the members of China Gold and Silver Trade Association, and most of them should be credible. Foreign platforms are generally regulated by FSA.