How to choose badminton?

Update:19-01-2019
Summary:

Badminton with good quality and speed is very important […]

Badminton with good quality and speed is very important for the smooth running of the game and the fun of fitness. The quality of badminton can be judged from the following aspects:
(1) The shape of the badminton should be neat, the leather of the wrapped ball should be smooth, no wrinkles, the feathers should be white and the angle of the insert should be consistent;
(2) The feather rod is slightly thick and straight, the glue is even, and the hand should be firm to have hardness, elasticity is good, and it cannot be deformed;
(3) When the badminton is tried, the stability of the flight is better, the rotation does not shake forward, does not drift, and the speed of the badminton in the same cylinder should not be significantly different.