SHANGHAI, Sept 8 (Reuters) - China's yuan strengthened further against the U.S. dollar on Friday morning to its highest level in nearly 21 months.
The spot market opened at 6.4800 per dollar and rose to a high of 6.4478 at one point, bringing the daily gains to 0.58 percent. It last reached these intraday highs in December 2015.
As of 0311 GMT, the onshore spot yuan slipped back and traded at 6.4518 per dollar.
(Reporting by Winni Zhou and David Stanway)