China has allowed trade with neighbors in the yuan.

China will allow trade with some countries in East Asia in the yuan in order to support their exporters, reported BBC News. Under the pilot scheme, if the two sides of foreign trade activities will be in the presence of yuan, they will not be obliged, as they used to go to the international currency market in order to exchange them for other currencies.
China now has almost all of its foreign trade in dollars and euros, which makes exporters vulnerable to currency fluctuations. In particular, the significant growth rate of the yuan in 2008 against both currencies has reduced the profitability of exporting enterprises in China.
According to the alleged scheme, the province of East China will be able to trade in yuan from Hong Kong and Macau - the territory formally under the jurisdiction of the PRC, but in fact are independent economic systems. At the same time, the two provinces of the south-western China (Guangxi and Yunnan) will be able to trade with Myanmar, Cambodia, Bangladesh, Singapore, the Philippines, Vietnam and some other countries in Southeast Asia. When the scheme starts to work, is not yet known.
One of the reasons for such a permit is waiting for Chinese officials instability dollar in 2009, which could hurt China's foreign trade. In doing so, the Chinese would require that the sale of yuan overseas was possible only with the accompaniment of instruments of trade. China prevents the convertibility of the yuan in order to control the growth of its currency, which is already popular in Asia.
Experts point out that the government had made concessions on a background of sharply deteriorating export statistics. For example, in November 2008, exports from China fell for the first time in more than seven years.