Froydis Ree Wekre , Norway, president of the International Horn Society, professor for horn in Oslo - Prof. Here in Germany visas cost DM 40.- only. There are also several consulates. Ask for a tourist visa. As a tourist you will not need a special invitation.
China has more tourists every year than any other country.
Just present your flight return ticket. The visa will be processed withing a week or even faster. Ask for a tourist visa.