What does the fourth department of Pu Jie Science and Technology Chengdu Co., Ltd. do?

The subject is asking, "What does the e4 department of Pu Jie Science and Technology Chengdu Co., Ltd. do?" ? Check the phone case. According to the information collected by employees, the e4 department of Pu Jie Science and Technology Chengdu Co., Ltd. is a dust-free workshop, which is used for the inspection, re-inspection and code scanning of mobile phone cases. Employees who enter the workshop first must wear dust-free clothes before they can work at their posts. Re-inspection means manual inspection and verification through assembly line, re-processing of defective products through machine screening, and scanning and packaging of qualified products. After packaging, it should be sealed with tape to avoid opening the glue.