First of all, look at the appearance, observe whether the pet turtle has rotten skin and rotten armor, whether its nails and tail tips are complete; secondly, look at the head, whether the eyes have spirit, whether the mouth breathing is normal, whether There is a runny nose; then observe whether the turtle crawls normally, and you can gently pull the limbs with your hands to see if the retraction is strong; finally, if conditions permit, you can also feed the turtle to see if the turtle eats normally.