China's yuan strengthens to 6.3997 against USD Monday

 　　BEIJING, Aug. 22 (Xinhua) -- The Chinese currency Renminbi, or the yuan, strengthens 35 basis points to 6.3997 per U.S. dollar on Monday, according to the China Foreign Exchange Trading system.

　　In China's foreign exchange spot market, the yuan is allowed to rise or fall by 0.5 percent from the central parity¹ rate each trading day.

　　The central parity rate of the yuan against the U.S. dollar is based on a weighted average of prices before the opening of the market each business day.

1 parity   

n.平价，等价，比价，对等

参考例句：

• The two currencies have now reached parity.这两种货币现已达到同等价值。
• Women have yet to achieve wage or occupational parity in many fields.女性在很多领域还没能争取到薪金、职位方面的平等。