Li Houlins diamond chain kingdom

Can selling diamonds also be turned into a chain business? Generally speaking, it seems that only standardized products or services, such as catering, clothing, laundry, fitness, and hotels, possess the conditions and advantages for chain operations. Diamonds are clearly not among them. It's impossible to find two diamonds in this world that are completely identical in weight, cut, clarity, and luster, and even a salesperson with ten years of experience would find it difficult to...