i want to know how much i should to pay for visa work or stady....

China visa is charged based on entries, not visa types. The more entries you are applying for, the more you need to pay. If you are applying for work or study in China, one entry will be enough. Because you need to change the visa to a temporary resident permit upon arrival in China within 30 days. The resident permit will then functions as a multiple-entry visa. A single entry visa costs Romania citizen USD30.