I think it shouldn't be a problem for you to pass the entrance test. I believe you're strong in maths and logics. :p One of our lecturers will be attending an exhibition in Guangzhou on Mar 16. Will you like to meet her? We will announce the time and venue soon.
Yes, English is the main laguage used in the school. The only chance you can speak Chinese in the school is communicating with other students from China. But, currently, China students aren't the majority in our programs.