China has experienced twin surpluses for many years. If the current account balance was $250 billion and the total capital and financial account balance was $260 billion, assuming O net errors and omissions, the changes in foreign reserve account within the BOP should be equal to . During this period, the total Chinese foreign reserve should be (increased or decreased) by as the central bank of China was a net (buyer or seller) of foreign currencies. China has experienced twin surpluses for many years. If the current account balance was $250 billion and the total capital and financial account balance was $260 billion, assuming O net errors and omissions, the changes in foreign reserve account within the BOP should be equal to . During this period, the total Chinese foreign reserve should be (increased or decreased) by as the central bank of China was a net (buyer or seller) of foreign currencies