The eighth China-ASEAN (Association of Southeast Asian Nations) Expo closed in the city of Nanning in south China's Guangxi Zhuang Autonomous Region on Wednesday, recording increased trade volume growth between firms from China and ASEAN member countries.

As of 4 p.m. Wednesday, the total trade volume at this year's expo reached 1.8 billion U.S. dollars, up 5.6 percent from the previous expo, said Zheng Junjian, secretary-general of the China-ASEAN Expo Secretariat, at a press conference held after the expo's closing ceremony.

Zheng said 105 international economic agreements were signed, with total investment up 10.9 percent from last year's expo to 7.4 billion U.S. dollars.

The eighth China-ASEAN Expo featured a theme of "environmental protection cooperation" and coincided with the 20th anniversary of the establishment of China-ASEAN dialogue relations.

About 2,300 enterprises participated in the six-day event, up 4.6 percent from last year, Zheng said.