According to the regulations of the Ministry of Communications, graduates with college degree or above in other majors in science and engineering can take the senior crew examination after studying in maritime colleges for one year, and are recognized as college diplomas in maritime majors in traffic ports. You can check the enrollment information on the websites of Dalian Maritime University, Shanghai Maritime University, Wuhan University of Technology, Jimei University, Qingdao Crew College, Guangzhou Maritime College and Shanghai Maritime Vocational and Technical College. Every school may not have it every year. Don't believe some advertisements. You have a bachelor's degree and contact the school to register yourself. There is a Chinese maritime service network to learn some industry knowledge.