Hello, actually there is no standard for this fee. I used to work in a gym, and they won't return their cards to members. If the card is transferred, the club will lose one member, so when I first joined the club, there was a signing process, which means I am willing to fulfill the terms of the contract. Even if the charge is unreasonable, I can only complain, and it is very troublesome. If I really don't want to, I will tell the club staff, but I generally don't agree. People I know can't save 300 yuan, and it's not a lot of money. I didn't want to go, it was too wasteful, so I spent the money anyway. My fitness card costs 500 yuan, so it's better to exercise.

I hope it helps you.