BEIJING — Nearly half of U.S. businesses have redirected planned China investments to other regions over the past year — highest on record — the American Chamber of Commerce in Shanghai said Wednesday.

The business chamber's survey of members came shortly after an escalation in U.S.-China trade tensions and a temporary rollback of some tariffs from mid-May. The two countries last month agreed to extend the trade truce by another 90 days, to mid-November.

"For a company, 90 days, that's just way too short," Eric Zheng, President of AmCham Shanghai, told reporters, pointing out that the supply chain planning is far longer term.

"At least we don't need to deal with even higher tariffs [for now], but the issue is not going away, it's still here," Zheng said.

As many as 47% of the responden

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