Useful. The certificate of professional skill level for operation and maintenance of 5G mobile network is issued by Beijing Huasheng Shi Jing Information Technology Co., Ltd., which is mainly for operators, communication engineering companies, communication equipment manufacturers and other enterprises and institutions. Having professional qualification certificates plays a great role in their work. Established in early 2004, Beijing Huasheng Shi Jing Information Technology Co., Ltd. is a future-oriented educational technology enterprise.