Friend (M, 21) going to study abroad in Shanghai, China

Hi! I have a friend who's going to study abroad in Shanghai China with a uni program pretty soon. If anybody on this site has lived there or is from there or has family there, are there any things I should warn him of? I've already told him to stick to the area around the university, to have a translating app at all times (surprisingly enough the courses he's going to learn there are introductory level.language courses which makes no sense to me but), and to make sure he performs a currency exchange. I told him to avoid clubbing as well unless he goes with his classmates. He's worried that people will treat him badly (he's 6'2, Black) because a friend told him that people may avoid talking to him or getting to know him due to issues with ancestry/saying it would piss off the ancestors, and that people still view visitors as "outsiders". I don't know anything about any cultural customs or beliefs, he's still planning on going and having a good time, please let me know anything that may make him feel less worried about going! If you have any websites with tips to recommend, please definitely let me know! If you also have studied abroad in Shanghai, feel free to respond as well! Thank you, I hope this post doesn't come off as insensitive, I am being genuine.