As Xie Ruilin's agent and psychic, I am qualified to answer. Let's start with the conclusion that Chow Tai Fook and Xie Ruilin may be more cost-effective. From the brand point of view, channeling may be the least cost-effective. This is the Royal Museum series. The other three brands are basically of the same grade. Zhou Shengsheng should be a full-hearted diamond series, mainly cutting, but the price is slightly higher. Dafu's quality is high, but he may not be as good as 3E in cutting. I am well aware of the criteria for choosing diamonds in Xie Ruilin. There is absolutely no problem with diamonds at this price, and 3E is inevitable. In addition, the crown angle, table top, pavilion depth ratio and overall depth ratio are more exquisite than those in Xie Ruilin.