In July 28-29 2004, CQC organized 16 technical experts from 11 National CB Laboratory, conducted spot checks of part of CB test files. This campaign of CB spots check is one of the most important element of the NCB re-assessment and expansion of Program work, and has a vital impact to the CB expansion work. There are more than 400 standard apply in plan for the CB expansion, and the sample files workload is very large. After two days of intense work, Experts spot checked more than 200 copies room CB CCC/CQC files involving four test products and services summed up as more frequent reports of a number of issues, and exchanged views with the related stuff of products found. Many experts on specific issues made the corresponding recommendations and approaches. The activities of CB spot test report achieved good results in the serious work of experts and relevant active collaboration with the Department of products, and during which problems found is a timely reminder to our work. It laid a solid foundation for expansion and re- assessment of CQC and its CB laboratories, and provides the adequate technical support and the orientation to improve for the future successful development of CB system testing and report accreditation work.