Does the use of a chain crown violate the advertising law?

Not illegal. According to the "Advertising Law" query, absolute words such as the best, the best, the most unique, the first and the only are prohibited when the merchants publish advertisements. It's a fact, not an absolute word. It can be used. Not illegal. Lianlian, a word in Chinese, refers to continuous inheritance and continuation, and also refers to verbose language and cumbersome words.