There are many international schools in Shanghai. Although some schools are not international schools, they also have international departments. I just helped you search one by one and found the following schools for your reference:

American university high school

Shanghai Changning International School

Shanghai normal university affiliated second foreign language school

the high school affiliated to fudan university

Shanghai Bohua Education International High School

Fudan Qiushi North American International High School

Shanghai high school international department

Shanghai Gezhi Middle School International Department

All of the above can take AP courses. In fact, you can also take IB courses, and universities all over the world can apply, not just the United States and Canada.