Rephrase the paragraph: Earlier China did maintain the value of its currency yuan at a fixed level to facilitate its exports. A weak yuan was well suited to push exports. Currency manipulation was seen as a tool/part for broader development strategy. But in 2014, things changed a little and China loosened its grip over yuan. As part of these changes , the Chinese central bank sets the value of yuan now, allowing it to fluctuate within a controlled range against the dollar. It allows investors to change the yuan's value 1% in either direction from the set rate each day as part of daily trading