I want to get him back and text him. When will it be ready? How are you tonight? What time is it now?

When do you want him to come back and text him? Can you deliver it at night? If I want to, you can send him a message at about, um, eight o'clock in the evening, because at this time, basically everyone is off work, except for overtime. If you don't consider going home after the exam, it must be dinner by this time. There is nothing to do, but you can send him a text message with your mobile phone dangling. He usually receives it the first time, and then, um, you can also send him a short message at a lower position than you want to put yourself in, and then be gentle and sincere, and then, um, pretend to be poor and win his sympathy. Well, the probability is still relatively high, and then you can try to call his classmates. If he agrees, you can send some WeChat or try to come out to play.