You can't. According to the Guiding Opinions on Physical Examination of Enrollment in Colleges and Universities, during the physical examination of college entrance examination, the weight should not be changed at will, and should be filled in strictly according to the real data, and no less writing is allowed. The National Unified Entrance Examination for Colleges and Universities, referred to as "College Entrance Examination", is a selective examination for qualified high school graduates or candidates with equivalent academic qualifications.