Hello, Mr.Rana Muhammad Javaid, i want to ask you a question: do you have the Invitation letter from the company/organization/institution you want to visit in China and a Visa Notice Sheet from an authorized governmental organization?
If they are not provided, it is dificulty for you apply for a China F visa.
At present, individual tourists are not accepted. Maybe you can contact a qualified travel agency of China to join a tour, then you can come to China.