I am glad to give you advice on the customs of giving gifts in my country.
Firstly, I think you need to find out what your Chinese teacher likes. Choosing the gift that your teacher is interested in is a good idea. Secondly, don’t pack the gift with black or white wrapping paper, because black and white aren’t considered to be lucky colors. Thirdly, don’t buy your teacher a clock, a pair of shoes, or some pears because these have bad meanings in Chinese when giving a gift.
I hope my advice can help you.
I know that you will visit your Chinese teacher’s home. If you do the following, I don’t think you will feel uncomfortable.
First, you should arrive a little earlier. Being late is impolite. Second, it’s also good to bring a gift such as some flowers or fruit. Third, you will probably use chopsticks to have dinner. Remember not to stick your chopsticks into your food. You’d better say that the food is delicious while you are eating. Finally, after dinner, showing thanks is also necessary. And you are not supposed to stay long after dinner.