The ASEAN (Association of Southeast Asian Nations) Currency Business Center, will allow direct convertibility of the Chinese yuan and the Vietnamese Dong.
The center, the first of its kind in China, will boost convenience for business people in the border areas, said Zhang Xiaogao, general manager of the International Business Department of the Agricultural Bank of China's (ABC) Guangxi branch.
It could help end rampant illegal private currency trading, he said.
The center has been initiated by the ABC in Dongxing City of south China's Guangxi Zhuang Autonomous Region.
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Pan Yong, a professor with Business School of Guangxi University, said that owing to lack of supervision, border merchants and tourists were likely to be cheated by private currency traders with counterfeit money.
"These 'bank stalls' challenge the country's foreign exchange management," he said.
Pan said that the center is a more secure and convenient way to exchange money, which will be a big blow to private currency traders.
In 2013, Vietnam spent USD 36.95 billion for imports from China, up 28.4 per cent, while it bought USD 13.26 billion worth of goods to China, up seven per cent year-on-year.