I bought the necklace in Hengxin Diamond Plaza, and the environmental service is good, but to be honest, it seems that the price is really high now (18 cents white diamond is more than 6000), and I haven't bought it there much since.
Well, diamond rings are made by many famous jewelry brands, and there are counters in big shopping malls. Personally, I think there is not much difference, such as Chow Tai Fook, Zhou Shengsheng, Xie Ruilin and Diamond. Diamonds have inspection certificates, and the quality is clearly written. Any company has good quality and a little worse. Just compare yourself, and the style depends on your preferences. Personally, I prefer big brands, because at that time we were looking at small brands, and white diamonds looked like topaz. I don't know if it's the appearance or the counter lighting, hehe.
The activities in the shopping mall are very intense. If the landlord wants to buy a better one, he has to shop around. When I bought it, it was also diamonds, which were similar in size and cleanliness, but because of activities, the prices of different shopping malls differed by thousands. But if you choose Chow Tai Fook, a brand that doesn't participate in activities anywhere, you don't have to compare it, hehe.
We have also seen Fu Rui Star, which looks ok and the price is much cheaper than the shopping mall. However, some people on the Internet said that they would hide the defects from consumers and should keep their eyes open.
Generally speaking, I think the first thing for the landlord is to read some knowledge about drilling (there are many online) so that he can know what he wants wherever he goes, hehe.
Finally, I wish the landlord happiness:-)