1. Judging by the distance between the cloaca and the rear end of the plastron: the distance of the male Asian sea turtle is farther, while the distance of the female Asian sea turtle is relatively short;

2. Judging by the thickness of the tail and the size of the base: the male Asian sea turtle has a slender tail and a thick base, while the female Asian sea turtle has a slender tail and a thick base. Mountain tortoises have thick tails and small bases;

3. Judging by the presence or absence of plastron depressions: male Asian sea turtles have plastrons with indentations, while female Asian sea turtles are flat without depressions .