1. Look at the shape of the excretory hole of the Chinese snapping turtle. The hole shape of the male snapping turtle is long, and the hole shape of the female snapping turtle is round.

2. Look at the excretory holes of Chinese and American snapping turtles The location of the excretory hole of male snapping turtles is closer to the tail, while that of female snapping turtles is closer to the plastron.

3. Look at the plastron of the Chinese and American snapping turtles. This part of the male snapping turtle has obvious depressions, while the female snapping turtle is flat, which is obviously different from the male snapping turtle.