Punching in during the winter vacation should continue. According to the relevant situation, colleges and universities should continue to do a good job of nailing students' health punch cards during the winter vacation and check the accurate data of students of all grades. Health punch data should include all students in the college. Nail is an enterprise-level intelligent mobile office platform built by Alibaba Group, and it is also a collaborative office and application development platform organized by enterprises in the digital economy era.