1documents against acceptance: D/A calls for delivery of documents against acceptance of the draft drawn by the seller. In D/A terms the collecting bank is permitted to release the documents to the buyer against acceptance of a bill of exchange.documents against payment: D/P calls for actual payment against the transfer of documents. In D/P terms, the collecting bank releases the documents to the buyer only upon full and immediate cash payment.offer: An offer is a promise conditioned on acceptance which, no matter whether from a seller or a buyer, must be communicated to the offeree and must clearly undertake a performance definite as to all essential terms.Counter offer is reply to an offer in which contains additions, limitations or other modifications. Counter offer is a rejection of the offer and therefore constitutes a new offer.Enquiry is a document issued by a party interested in the purchase of goods specified therein and indicating particular, desirable conditions regarding delivery terms, etc., addressed to a prospective supplier with a view to obtaining an offer.Acceptance: Acceptance is a final and unqualified expression of assent to the terms of an offer.The multimodal transport document (MTD) is a document which evidences the combined transport contract and indicates that the multimodal transport operator shall take over the goods and shall be responsible for delivering the goods according to the clauses in the contract.Distribution is a kind of international trade forms that based on a certain agreement. The seller (the supplier) authorizes the rights of purchase, sale and allocation to the buyer (the distributor) within specific areas or regions and periods.Agency is dealing with a contractual relationship when an agent is authorized to act on behalf of another (called the principal) to create a legal relationship with the third party.Tender： Tender is a procedure to generate competing offers from different bidders looking to obtain business projects in works, supply, or service contracts under a contract. It includes two parts. One is invitation to tender, and the other is submission of tender.Auction： An auction is the process of buying and selling goods by offering them up for bid, taking bids, and then selling the item to the winning bidder. International auction is a method of international trade, which is usually organized by special organizations, such as auction house.Transport packing is also called big or outer packing. It means that we put the individual or several commodities into container during the process of transport. Its main functions are to protect goods, and make the goods easy to store and ship. Selling packing is also called small or inner or immediate packing. It is mainly used to protect products, make the products convenient to use, and to promote sales.Fairs and sales is a trade means that combines the fair or exhibition with sales. The seller can sell goods on fairs or exhibitions.Bill of Lading is a document issued by a carrier which is evidence of receipt of the goods, and is a contract of carriage. It describes the goods, the details of the intended voyage, and it specifies the conditions of transportation.The more or less clause is a clause which stipulates that the quantity delivered can be more or less within certain extent. It is often used in the trading of agricultural or mineral products. The most commonly used way is allowing some percentage more or less.Neutral packing means that there is neither a name of origin, nor a name and address of the manufacturer, nor a trade mark, a brand, any word on the outer or inner packing of commodity.Brands Designated by the Buyer It refers to the packing that the goods should be packed according to the trademark and brand designated by the buyer. The shipping advice is a notice to the importer on summary of the shipment. The buyer may arrange the cargo insurance on time based on the shipping advice ( if buyer is to arrange the insurance) . Moreover, the buyer may know when to receive the goods and arrange with a customs broker for the cargo clearance.Documentary Credit means any arrangement acting at the request and on the instruction of a customer ( the “applicant”) to pay a determinable sum, provided that the terms and conditions are compiled with according to the documents.Please explain the main procedures in export business. For the exporter, the main procedures in export business include preparation of goods, arrangement for letter of credit, 2arrangement for transportation and insurance, applying for the inspection of goods before shipment, application for custom clearance, making documents and settlement of exporting proceeds. The seller prepare for the goods according to the time limit stipulated in the contract and in accordance with the latest date of shipment in L/C. If the buyer fails to establish the L/C, or it does not reach the seller in time, the seller can urge him to expedite opening the L/C.。