China said on Monday that the United States had “severely undermined” the trade truce the two countries reached last month, striking back against President Trump’s accusations that it was violating the terms of their agreement.

       In a statement, China’s Ministry of Commerce called Mr. Trump’s attacks on social media last week “baseless.” He had accused Beijing of failing to live up to its end of their trade deal, a 90-day rollback of tariffs and other trade barriers to give the two countries more time to negotiate and prevent an all-out trade war.

       China’s commerce ministry said it had continued to honor its agreement responsibly and accused the United States of “erroneous practices” by introducing a series of “discriminatory restrictive measures.” These included restrictions on the sale of chip design software to China and barring American companies from using or financing artificial intelligence chips from the Chinese technology giant Huawei.

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