Importers and exporters to the customs declaration required to submit the following documents: 1, import and export goods declaration form. Ordinary imported goods should fill in duplicate; need to be written off by the Customs of goods, such as processing trade goods and bonded goods, etc., should fill in a special declaration in triplicate; exports of goods in the domestic needs after the tax rebate, should fill out a tax rebate declarations. 2, cargo invoices. Requirements of the number of copies is less than the declarations of a commissioned sales abroad, exports of goods, the method of payment until the sale of goods by the amount of actual sales to the settlement of export unit may be allowed to exempt from export declarations. , Land orders, bills of lading and shipping of the air waybill and seaborne imports export shipping order. Customs in the examination of documents and inspection, in the original bills of lading signature release refund declaration tribute, by virtue of delivery or shipment. 4, cargo packing list. Number of copies of the same invoice. However, bulk cargo, or a single species, and packaging content pack goods to be exempted. 5, a single export verification. The foreign exchange administrative departments of all export goods declaration shall present single stamped "supervision receipt" chapter of the export verification, and write off the number to fill in at the upper right corner of each export declaration. 6, when the Customs deems necessary, but also the examination of trade contracts, cargo certificate of origin. (7) other relevant documents. Include: 
 (1) to grant tax cuts approved by the Customs, tax reduction and exemption of tax-free goods, payable Customs signed certificate, the Beijing foreign-funded enterprises is subject to inspection issued by the customs list of imported equipment; (2) the processing trade has been the record to the Customs import and export of goods of the contract, shall present the "Registration Manual" issued by the customs. Customs agents relative to their own customs, both in terms of the import and export declarations. The customs agents are divided into the direct agent of customs and indirect customs agents. Direct agent declaration is a declaration accepting entrusted to handle the customs business on behalf of the client's behavior. Indirect agent declaration is a declaration accepting the entrusted declaration enterprise's own name to the Customs for customs clearance business behavior.