In November, China's foreign exchange reserves rose for the 10th consecutive month. China's Central Bank announced the latest foreign exchange reserves at the end of November was US$ 3.119 trillion, an increase of US$ 10.064 billion. It should be noted that the November foreign reserve increase is the data before the passage of the tax reduction act in the United States. The dollar appreciation caused by the tax cuts in the United States will attract more funds to the United States. This may have an impact on the RMB exchange rate and the outflow of capital from China, affecting the future changes in China's foreign reserves.