My long-distance boyfriend, Cheng, has been working overtime on business trips every day recently. How should I greet him or not bother him by sending him a message?

He is a programmer. Although he has been working overtime on business recently, he always has time to eat and sleep, right? Just take time to send him a message and say hello. I hope he will take care of himself and not stay up late. I'm sure he will appreciate your concern for him. However, you are boyfriend and girlfriend, and he should take the initiative to say hello to you! If you only say hello to him and he doesn't say hello to you, you'd better think it over.