Every school has some requirements when selecting associate professors, full professors or evaluating the titles of associate high schools and full high schools. For example, how many projects you need to host, how many patents you need, how many articles you need, how long you have been a guest abroad, and whether you have overseas experience. In a place where experts gather, such as Peking University, the conditions are definitely more, and the selection is even more difficult. In local colleges and universities, there are not so many people, so the requirements are not so high. Some places only need to host a project, and several sci can participate in the evaluation of associate professors.