Normal. According to Xuexin.com official website, the principal's name is not the key information of Xuexin.com, and it is normal that there is no principal's signature. As long as the name, graduation school, graduation major, full-time degree and graduation certificate number of academic information are correct, the authority of academic information will not be affected. Xue Xin. Com is the information network of higher education students in China, where you can inquire about academic qualifications and student status.