Xunfeng badminton racket is not an off-brand KUMPOO (Xunfeng).

Kumpoo "Xunfeng" is the second largest badminton brand in Japan. It was founded in Japan in 2001. It is Japan's leading badminton brand, an equipment manufacturer certified by the International Badminton Federation (BWF), and a strategic partner of the Global Chinese Cup. The exclusive title sponsor of the Macau Open, the only designated equipment supplier of the Macau team, and a company specializing in the production and sales of badminton products.

Net posts:

From the ground of the court: the height of the net posts is 1.55m. The net posts must be firmly perpendicular to the ground and keep the net tight. The net posts should be Placed at the midpoint of the doubles sideline.

A badminton shuttlecock should have 16 feathers fixed on the ball support. The feathers are 64-70mm long, but the length of each ball's feathers from the support surface to the tip of the feather should be the same. The top of the feathers is rounded with a diameter of 58-68mm, the diameter of the ball support is 25-28mm, the bottom is round, and the shuttlecock weighs 4.6-5.5g. For balls not made of feathers, they are required to be made into skirts, and the difference in quality and performance must not exceed 10%.