China's Ministry of Commerce on Saturday announced an anti-discrimination investigation into U.S. trade policy over analog chips and a separate investigation into dumping, the day before a new round of U.S.-China trade talks in Spain.

The first investigation would examine whether Washington had discriminated against Chinese companies in its policies on trade in chips. The second would look into suspected dumping of imports of some U.S. chips used in such devices as hearing aids, Wi-Fi routers and temperature sensors.

The ministry said in a statement that the United States had imposed a series of restrictions on China over chips in recent years, including trade discrimination investigations and export controls.

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