Buying price, that is, buying exchange rate, is the exchange rate used by banks to buy foreign exchange from customers or peers.
The formation method of the middle price is as follows: China Foreign Exchange Trading Center makes an inquiry to all market makers in the inter-bank foreign exchange market before the daily opening of the inter-bank foreign exchange market, and takes all market makers' quotations as calculation samples of the middle price of RMB against the US dollar. After excluding the highest quotation and the lowest quotation, the remaining market makers' quotations are weighted and averaged to get the central parity of RMB against the US dollar on that day, and the weight is determined by China Foreign Exchange Trading Center according to the trading volume and quotations of the quotations in the inter-bank foreign exchange market.