During the transaction negotiation stage, the importer first sets out the necessary conditions and inquires the exporter or expresses its purchase intention through an intermediary, so that the relevant "supplier" or "exporter" can contact him, or the exporter directly submits a negotiation to the importer; then the exporter makes an offer to the importer, and the importer counter-offers, and the two parties agree to "accept" the offer through letters and telegrams to complete the offer, and then the transaction is concluded. During the transaction negotiation stage, the importer first sets out the necessary conditions and inquires the exporter or expresses its purchase intention through an intermediary, so that the relevant "supplier" or "exporter" can contact him, or the exporter directly submits a negotiation to the importer; then the exporter makes an offer to the importer, and the importer counter-offers, and the two parties agree to "accept" the offer through letters and telegrams to complete the offer, and then the transaction is concluded. During the transaction negotiation stage, the importer first sets out the necessary conditions, makes inquiries with the exporter or expresses its purchase intention through an intermediary, so that the relevant "supplier" or "exporter" can contact it, or the exporter can directly contact the importer. Proposal for negotiation;