US companies in China forecast a gloomy year ahead, with many worrying about a deterioration in bilateral trade ties and nearly a quarter delaying investments, a business survey showed Tuesday.

The survey of 314 US businesses by the American Chamber of Commerce in China provided a full accounting of challenges American business face after Beijing and Washington exchanged tit-for-tat tariffs on more than $300 billion in two-way trade.

The report was released two days after US President Donald Trump said he would delay a planned further hike in tariffs on Chinese goods this week after he and Beijing both hailed “substantial progress” in trade negotiations.

“Certainly our members are hopeful that the uncertainty and the loss and the delays in business that have resulted from the trade negotiations and trade frictions will turn out to have been worthwhile in the end,” said Tim Stratford, chairman of the chamber.

“If not then it would be a tremendous waste,” he told reporters.

The survey found that 89 percent of businesses reported a pessimistic view on the world’s most important bilateral trade relationship.

The tariffs directly hit US businesses, increasing costs and lowering demand from Chinese consumers with some companies even forced to lay off workers, the survey showed.

The US-China trade spat was among the top concerns for businesses across sectors. Three-fourths expect the relationship to further deteriorate or remain the same this year.

Nearly two-thirds said the tensions affected their plans for the market, and caused nearly a quarter to delay further investment in China, the survey showed.

About one-fifth of firms have moved or are considering moving production outside of China, with the tariffs and rising costs top reasons, according to the survey.

Still US firms see the tariffs have gotten both governments to sit down at the negotiating table and seriously hash out their issues, Stratford said.

He added that a separate business survey conducted last week found a majority of firms think tariffs should be kept in place “in some fashion” during negotiations.

Concerns have grown among top US lawmakers that President Donald Trump will settle for a deal that steps up Chinese purchases of US goods without solving the thornier issues like Chinese state support for firms and an unfair playing field for foreign companies.

Buying more American products “doesn’t address the underlying systematic problems, and if we don’t address the underlying systematic problems then I think we will not be putting the trade relationship on a sustainable footing,” Stratford said.