Can you help me with my tourist visa?

What do you mean 'Sponsor"? To apply for L type ones, invitation letter or round-trip air tickets and hotel reservation are needed except their passports, completed application forms and recent passport size photos. People from certain countries are required to provide travel insurance (100 USD per day).

If you don't have the invitation letter, you can arrange round-trip air tickets and hotel reservation instead.

Hi I am sri lanka married to chinese and living in shanghai for years . Even if you get the letter it must be Duly Authorized Unit from china if not the embassy dont accept but if you go from a tour thats different .