The Office of the U.S. Trade Representative (USTR) on Monday launched seven days of public hearings on a plan to impose tariffs on another 300 billion U.S. dollars' worth of Chinese products. 

During the first day of hearings, the U.S. businesses warned that the additional tariffs would drive up prices for consumers, squeeze profits and leave U.S. companies at a competitive disadvantage to foreign rivals that aren't subject to higher taxes on the components they buy from China.

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These companies also complained they have few alternatives other than China for producing clothing, electronics, and other consumer goods. Earlier, 600 U.S. companies, including one of the country's biggest retailers Walmart, sent a letter to the Trump administration, asking it to reconsider the new tariffs.

The hearings will end on June 25.