Laofengxiang
Chow Tai Fook, wait. Specifically: the first floor of Dacheng Dada Department Store and the first floor of Wal-Mart. There is also a diamond shop on the pedestrian street, next to the Industrial and Commercial Bank of China. As long as it is a big name, it is basically a national warranty. Like Lao Fengxiang, every piece of jewelry has its own mark, so you can take care of it directly in the specialty store without a receipt or certificate.
Happy wedding.