Ministry of Commerce, Customs General Administration of Quality Supervision, Inspection and Quarantine Order No. 7 of 2008, effective 2008-05-01 The state exercises management over imports of machinery and electronic products, which are divided into ban on the import, import restrictions and free import of three categories. Free imports of machinery and electronic products import of automatic import license administration. Quotas to restrict imports machinery and electronic products management. Import of used mechanical and electronic products, management practices since May 1, 2008 shall come into force, this approach applies to the import of used mechanical and electronic products to the Peoples Republic of China's behavior. The import of used mechanical and electronic products, import licensing and "a lot a license"or" non one lot one license"management