Part of the visit is to make joint efforts to promote a rules-based international order.

Kamala Harris will become the first US vice president to visit Vietnam.

"Vice President Harris has an opportunity to show that the US is back - not just in the security realm but in trade, too."

Kamala Harris's trip to Vietnam is expected to support Vietnam in building up its maritime security capacity.

Vaccines, regional security, and climate change are expected to be discussed during the trip.