PHNOM PENH, Aug. 24 (Xinhua) -- The first Cambodia-China Business and Investment Forum will be held on Sept. 12 in Nanning City in southwestern China's Guangxi Zhuang Autonomous Region, according to a Commerce Ministry announcement on Wednesday.

The forum will be convened back-to-back with the 13th ASEAN-China Expo, which will be attended by Cambodian Prime Minister Samdech Techo Hun Sen, the announcement said, urging businessmen and investors to register for the event.

"This business summit is very useful for Cambodian businessmen and investors," it said.

The forum will contribute further to boosting trade and investment ties between Cambodia and China. According to the government's figures, trade volume between the two countries was valued at 4.4 billion U.S. dollars in 2015, up 18 percent year-on-year.

On the investment side, China is the largest investor in the Southeast Asian country with cumulative investment of over 11 billion U.S. dollars from 1994 to 2015, according to the Council for Development of Cambodia.