

My F visa is 5 days too short, where and how should I prolong?
I am a Dutch student and I have completed a summer school in Beijing, so I have a F type. My F type has a duration of stay of 60 days, whereas I planned to stay in mainland China 65 days. Now I am in Shanghai, where I follow a business/cultural program. I cannot extend my type F because I am not a student of a Shanghai university and my inviter (a company) does not give the necessary invitation letter & tax form supporting document. Next week I want to travel for three weeks through mainland China, but I need to someway extend my F type with 5 more days in order to prevent illegal stay in China. I wanted to apply for a stay permit of 30 days in Shanghai but the PSB here says it is not possible. Am I eligible for the 144-hour free transit? I think it is OK for me to travel in Shanghai, Suzhou and Hangzhou in the last week. If not eligible, should I go to Hong Kong to apply for a L tourist type? My girlfriend and I, we only have a single entry permit but we fly back to Europe from mainland China (Shanghai), so do we need to apply for another tourist L type in HK in order to go back to Shanghai?