The central parity rate of the yuan, China's currency Renminbi (RMB), retreated to 6.7783 per U.S. dollar Thursday from 6.7715 per U.S. dollar Wednesday, according to the data released by the China Foreign Exchange Trading System.

The central parity rate of the yuan advanced to a record high against U.S. dollar Wednesday from 6.7722 per U.S. dollar Tuesday.

China's central bank announced on June 19 this year that it would further the reform of the formation mechanism of the yuan exchange rate to improve its flexibility.