Just bring your ID card to the service desk on the second floor of Jiayuan. 20 yuan can redeem 1000 points. When you have any activities, you will send a text message to your mobile phone (the mobile phone you left when you applied for a card will be received if you change it). If the locker is full, you should store it at the front desk, but computers and things like that can't be stored. Just take it in.