Mr.Aakyaw, this site is not the official one for Chinese embassy, but one about China tour services. What I can say is there are many people from worldwide working in China. L visa to China, you need to apply from Chinese embassy in your country in advance. After entry, it can be extend in China for a certain period. The requirements are as follows:
1.Passport: Your valid passport must have at least six (6) months of remaining validity and at least one blank visa page.
2.Application form: One completed Visa Application Form.
3.Photo: one recent photo of 2x2 square inch (black & white or color is acceptable) glued or stapled on the application form.