To identify the authenticity of YY rackets, you can refer to the following methods:

1. Check whether the racket shaft and the taper at the front of the handle have laser-engraved factory numbers, that is, double Steel number. The product serial number is on the handle and is different for each racket. The cone is the product batch number, and the same batch of products has the same batch number. The two English letters at the end of the batch number represent the sales area, and mainland China is CH.

2. Check whether the end of the string hole rubber particles of the racket is in a V-shape that opens outward, and the edges are sharp without chamfers, which are prone to burrs.

3. Check whether the white "YY" LOGO on the bottom cover of the racket is slightly protruding and can be touched. At the same time, the font of "JAPAN" is also very special, with neat edges and no burrs.

4. Note that the laser anti-counterfeiting label of the racket is oval and golden. It is usually attached to the cone of the handle. Under the light, you can see the "YY" type LOGO and the dark pattern of "YONEX".

The above methods are for reference only. In order to ensure that the racket you buy is authentic, it is recommended to buy it from a regular store or choose to buy it from the official flagship store online.