School in Beijing for 2 months, followed by employment in Shanghai for 5 months

Hello - I have been accepted to attend a program at CUC in Beijing for two months, as arranged by my university here in Canada. Afterwards, there is a possibility of working for approximately 5 months in Shanghai. I will be applying for a business visa for school, but this will only allow me stay in China for 6 months. Is it possible to extend this once I am in Beijing? Or should I apply for an employment visa while I am there? Thank you for your help!