China will launch a pilot project allowing its currency to be used in some international trade transactions, AP reported. The program would permit use of the yuan in trade between Hong Kong and Macau and the heart of the mainland export industry, Guangdong province and the Yangtze River delta, official said on Wednesday. The report also said transactions would be allowed between the southwestern Chinese regions of Yunnan and Guangxi and the 10-member Association of Southeast Asian Nations. Other details were not announced.