All sides are expecting Wednesday's summit will reach new consensus on the future development of LMC and point a new direction for the mechanism, he told Xinhua.

Co-chair Sok Siphana, an advisor to the Cambodian government, hailed the dynamic Lancang-Mekong Cooperation mechanism.

"This initiative has been very dynamic, the spirit of cooperation is very strong, that's why we have been moving very fast in less than three years to reach the summit level," he said.

As there is no division of the mechanism, Siphana didn't see any political challenge, but more of a operational level of challenge.

"Because it's so broad in scope, ranging from connectivity, cross-border issue to agriculture, poverty, and water management, to us, as a Mekong-Lancang secretariat, the big challenge is to coordinate with many ministries in the country."

"To me, it's more about sweat than political headaches," he said.

The Second Lancang-Mekong Cooperation Leaders' Meeting, themed "Our River of Peace and Sustainable Development", will be held in the Cambodian capital of Phnom Penh on Wednesday.

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