PHNOM PENH, Sept. 13 (Xinhua) -- Cambodian Prime Minister Samdech Techo Hun Sen returned home on Thursday after attending the 15th China-ASEAN Expo in Nanning City in China's Guangxi Zhuang Autonomous Region and the World Economic Forum on ASEAN in Vietnam's Hanoi.

Speaking at a press briefing at the Phnom Penh International Airport upon Hun Sen's return, Kao Kim Hourn, a minister attached to the prime minister, described Hun Sen's trip a success, which had importantly contributed to further promoting Cambodia's ties with China and other ASEAN countries.

ASEAN (the Association of Southeast Asian Nations) groups Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Vietnam.

"The expo was vital to boost Cambodia's trade volume with China and other ASEAN countries, and to attract more Chinese investors and tourists to Cambodia," he said.

After taking part in the expo, the Cambodian prime minister continued his trip to Hanoi for the World Economic Forum on ASEAN, Kim Hourn said, adding that on the sidelines of the forum, Hun Sen had met with several foreign leaders on bilateral ties.

"In conclusion, the prime minister's four-day working visit to China and Vietnam has contributed further to enhancing bilateral relations between Cambodia and China, and between Cambodia and Vietnam as well as other countries," he said.