In the balance of payments, all items that cause an increase in domestic foreign exchange income are recorded as credits, and all items that cause a decrease in domestic foreign exchange income are recorded as debits. In the balance of payments tables compiled in China in recent years, the balance of a certain item is recorded as a plus sign when it is credited, that is, the balance of a certain item is recorded as a surplus, while it is recorded as a minus sign when it is debited, indicating the balance of a certain item as a deficit.

Then frequent positive changes mean that the balance is in the lender, which leads to an increase in domestic foreign exchange income. Naturally, foreign countries' unilateral value transfer to China (such as donation and family expenses transfer) is greater than China's value transfer to foreign countries, while the minus sign is just the opposite.