BEIJING, Aug. 23 (Xinhua) -- President Xi Jinping sent a congratulatory letter to the 12th China-Northeast Asia Expo that opened Friday in Changchun, capital city of northeast China's Jilin Province.

Calling Northeast Asia one of the world's most dynamic regions in terms of development, Xi said the joint construction of the Belt and Road continued to inject new momentum into expanding and deepening cooperation in the region.

Favorable conditions for strengthening regional cooperation in Northeast Asia have been accumulating, he said.

The expo's theme, enhancing mutual trust and cooperation to create beautiful prospects for Northeast Asia, reflected the common aspiration of the relevant parties to pursue regional prosperity and development, Xi noted.

He expressed the hope that governments, institutions and business representatives can make good use of the expo as a platform to cement consensus, advance collaboration, make further achievements, and join hands to create a brighter future for Northeast Asia.