what courses doe beijing university offer in science and business at master degree level?

The Peking University does not have such kind of degree on science and business, but they have related degrees, such as the accounting, finance, business management and so on. They provide the courses like Audit and management control, Finance and Insurance, International Capital Market and so on. There are a lot of courses they provide, I cannot provide you all. I advise you to find the content on their website, that will be helpful.