The move could add to tensions ahead of Chinese President Xi Jinping’s visit to the U.S. and his meetings with President Barack Obama, which is set for late September. It could also complicate China’s efforts to get the yuan added to a basket of currencies tracked by the International Monetary Fund – efforts aimed at giving the yuan greater acceptance abroad. Longer-term, the move raises questions about Beijing’s pledge to liberalize its economy. On one hand, making the yuan more market-driven is a step in that direction. But the move also appears to be designed to help exporters, at a time when China has been looking for other, more dependable sources of growth.