China’s current account surplus declined significantly from its peak of nearly 10 percent of GDP in 2007 to less than 1 percent in 2018.The new pattern offered fresh evidence for our understanding of China’s current account dynamics.In this paper we used flow offunds data to gauge its underlying driving forces.Specifically,by employing index decomposition analysis,we decomposed the current account from the perspective of savings and investment into three sectors:the household,corporate,and government sectors.We found that the decline in China’s current account ratio wasfirst driven by cyclical factors,i.e.weak corporate saving growth induced by the economic slump in 2009 as well as the following massive corporate investment bolstered by the government stimulus plan.However such cyclical factors quickly subsided,and the subsequent current account balance reduction was later supported by structural factors,i.e.household savings declined enduringly and the Chinese government switched to a more expansionary fiscal policy.There are three possible explanations for the structural movement:reduced precautionary saving due to higher social security coverage ratio,lower corporate profits as a result of economic slowdown,and a twin deficit due to the government’s more relaxedfiscal stance.The new facts,however were not consistent with other current account theories focusing on long-term aspects of the saving-investment account puzzle,especially those relating to China s special demographic characteristics.