This depends on the specific requirements of the school. If it is a graduation thesis, the school will have a clear word requirement. If you want to contribute to a journal, the situation of each journal is different, but generally speaking, social science papers like journalism require more words than natural sciences, at least 6,000 words. Individual journals, especially C journals, have higher word count requirements. If you want to contribute to a higher level journal, it is recommended to write more.