"China Foreign Exchange Trading Center regularly publishes CFETS RMB exchange rate index, which helps to guide the market to change the habit of paying attention to the bilateral exchange rate of RMB against the US dollar in the past, and gradually take the effective exchange rate calculated with reference to a basket of currencies as the main frame of reference for the RMB exchange rate level, which is conducive to maintaining the basic stability of the RMB exchange rate at a reasonable and balanced level.