Everything in ordinary shopping malls is quite orthodox.
I suggest going to the jewelry exhibition. Every April, there is one exhibition hall in Shanghai, one exhibition hall in Shenzhen after September 10, and one exhibition hall in Beijing after September 10/0.
I've been there. They're all good. The jewelry inside is very concentrated, except for wholesale and retail. Because it is an exhibition, it pays more attention to publicity, and the price is much cheaper than that of shopping malls. There will be no fakes. I just bought a red ring at a jewelry show in Beijing this year. It's beautiful, only over 200 yuan.
Generally, the red ring of 24K gold will be ugly, and the rose gold of 18K is particularly beautiful and there are many styles. The place that really sells jewelry will tell you the current price of gold, and then call the ring money, so the price is more transparent and much cheaper. Many shopping malls directly price, which is very expensive.
If you are in Beijing, you can also recommend Xisiyang Hutong, which is next to the Ministry of Land and Resources. The price is cheap, and there will be no fakes, because the management department is nearby.