Chinese President Xi Jinping will embark on a three-nation Southeast Asia tour next week in his first overseas trip this year to consolidate ties with some of China's closest neighbours as trade tensions with the United States escalate.

President Xi Jinping will visit three Southeast Asian countries next week, as China steps up efforts to court partners to buffer the economy against an escalating trade war with the US.

The rare bilateral visits to Southeast Asian nations mark a high-profile personal diplomatic outreach for Xi. Earlier this week, the Chinese president pledged to deepen "all-round cooperation" with China's neighboring countries.