(1) The main payment tool used is bill, which is a written payment voucher issued by the drawer that unconditionally agrees to pay a certain amount by himself or others and can be endorsed and transferred. Bills generally include bills of exchange, promissory notes and checks.

1. Draft is the main payment tool for international settlement. It is a written payment order issued by one person to another, asking the other party to unconditionally pay a certain amount to someone or the holder at the spot or at some time in the future. The essence of a bill of exchange is the creditor's certificate issued when the creditor provides credit. Its circulation and use must go through legal procedures such as ticketing, endorsement, presentation, acceptance and payment. Refuse, you can exercise the right of recourse according to law.

Bills of exchange can be divided into four categories:

(1) According to the drawer, it can be divided into bank draft and commercial draft. The drawer and drawee of a bank bill are both banks, and the drawer of a commercial bill is an enterprise or an individual.

(2) According to the different payment time, it can be divided into sight draft and forward draft. A sight draft can be paid on presentation or at sight. A time draft is a bill payable at a specific time or date.

(3) According to whether documents are attached, it can be divided into clean tickets and documentary tickets. Clean bills have no documents, while documentary bills have shipping documents.

(4) According to different acceptors, it can be divided into bank acceptance bills and commercial acceptance bills. The former is a long-term bill accepted by banks, and the latter is a long-term bill accepted by enterprises or individuals.

2. A promissory note refers to a written certificate issued by one person to another person to guarantee unconditional payment of a certain amount to the payee or holder at sight or at a certain time. The parties only have the drawer and the payee.

3. A cheque is a written payment order issued by a bank depositor to a bank, authorizing it to unconditionally pay a certain amount to someone or a designated person or a holder.

(2) Documents in settlement are divided into basic documents and auxiliary documents.

1. Basic documents refer to the documents provided by exporters to importers, including commercial invoices, transport documents, insurance documents, etc.

2. Subsidiary Documents Special documents or other long-term documents provided by exporters to comply with the government regulations of importers.