There is nothing wrong with the certificate. Judging from the picture, this jade is of poor quality (there is no water head at the bottom). 300 yuan is a bit expensive. It doesn't mean that the quality of a commodity is good or the price will be high. A goods only mean natural goods that have not been bleached, glued and dyed. In addition, the so-called winning activities in shopping malls are just a means of their promotion, in order to let customers have the psychology of buying real benefits and earning cheap.