It is OK for you to stay in the campus with English. In nowadays, almost all the undergraduates study Englsih in China. You can communicate with them in English. Winter in Harbin is extremely cold, you need to pack more warm winter clothing to prevent the cold. You can go to search for the official website of the university to know more about it.

I studied at Harbin Engineering University up till last year. I think you'll be pleasantly surprised at how well you can get around with only English and how helpful the students are. The most common illnesses in Harbin are coughs and colds, make sure to eat well and dress appropriately, especially in March and April when the seasons are changing. HEU is a beautiful university as far as Harbin goes, and it was an overall pleasant experience for me. The teachers on campus are very qualified, probably some of the best I've seen here. If you need to go shopping there is a Carefore a couple bus stops up HongQi dajie, take bus 203. Best of luck to you.