The life customs of Anshan people are very casual, and there is nothing too particular about them. I went to my boyfriend's house for the first time in Chinese New Year. You should buy something, whether it is polite or not, it depends on your own ability. No matter whether you have bought anything or not, your boyfriend's family can only give you money if they value your prospective daughter-in-law, otherwise they won't. As for how much, it depends on your mind (I gave it to 1000 at that time, hehe).