China and Vietnam signed dozens of deals this week amid the U.S.' global trade war in what President Donald Trump says is an attempt to "screw" Washington.

China's President Xi Jinping called on Monday for stronger ties with Vietnam on trade and supply chains amid disruptions caused by U.S. tariffs, as he attended the signing in Hanoi of dozens of cooperation agreements between the two communist-run nations.

Xi Jinping is in Southeast Asia to build bonds with countries that also face U.S. tariffs and have come under pressure from Washington to curb the transshipment of Chinese goods.