At the beginning of 2021, the ISO9001 quality management system certification audit expert group conducted two stages of certification audit for our company. The experts of the audit team carried out document review, record inspection, inquiry conversation and on-site inspection in groups, and comprehensively and carefully reviewed all the work of the company's leadership, office, accelerator department and electric vacuum department. Through a comprehensive and serious review, the experts of the audit team highly praised and fully affirmed the operation of our company's ISO9001 quality management system. They believed that the leaders of Yikang Company attached great importance to the implementation of the standard, the quality management system was standardized, orderly and feasible, and the experts agreed to pass the audit.