The Chinese currency Renminbi, or the yuan,weakened 9 basis points to 6.3456 against the U.S. dollar on Monday, according to China's Foreign Exchange Trading System. In China's foreign exchange spot market, the yuan is allowed to rise or fall by 1% from the central parity rate each trading day, according to China's (Xinhua) News Agency. 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.