According to Huayu Education Network, double first-class universities are selected every five years. The evaluation cycle of double first-class universities is usually five years, that is, once every five years. This circular setting is to ensure the sustainable development and promotion of double-class universities. During this period, double first-class universities need to constantly carry out self-examination and improvement to ensure that their education quality and research level can be comparable to those of international first-class universities. The evaluation cycle of double first-class universities is usually five years, that is, once every five years. This circular setting is to ensure the sustainable development and promotion of double-class universities. During this period, double first-class universities need to constantly carry out self-examination and improvement to ensure that their education quality and research level can be comparable to those of international first-class universities.