First of all, see if it is the national medicine standard word Z 20073016; Secondly, the pad is yellowish brown (including Yunnan Baiyao, but white without Yunnan Baiyao). You can drop a few drops of water on the pad, and you can see that the color of the pad becomes lighter (add medicine to the water, but this piece can only be discarded). Of course, there is a name: what is the fake "Southern Baiyao"; "Yunnan Hundred Medicines" and so on.