1) Single currency open position refers to the sum of spot net open position, forward net open position and adjusted option position of each currency, reflecting the foreign exchange risk of a single currency. ① Net spot opening. Spot net open position refers to the open position formed by the business included in the balance sheet, which is equal to the spot assets in the table MINUS the spot liabilities. ② Long-term net opening. Long-term net open position mainly refers to the open position formed by buying and selling long-term contracts, and its quantity is equal to the bought long-term contract position minus the sold long-term contract position.