1. Determine the type and quantity of transaction currency: both parties need to negotiate to determine the type and quantity of transaction currency, as well as transaction details such as transaction price and delivery time.
2. Signing a transaction contract: Both parties need to sign a formal transaction contract, specifying the terms and details of the transaction, including currency and quantity, price, delivery time and delivery method.
3. Payment of deposit: During the transaction, both parties need to pay a certain amount of deposit as a security deposit for the transaction to ensure the security and reliability of the transaction.