Hong Kong CNN —Shares in SMIC, China’s largest contract chipmaker, plunged on Thursday, after two US congressmen called on the White House to further restrict export sales to the company. The comments came after Huawei Technologies introduced the Mate 60 Pro, a Chinese smartphone powered by an advanced chip that is believed to have been made by SMIC. TechInsights, a research organization based in Canada specializing in semiconductors, revealed shortly after the launch that the smartphone contained a new 5G Kirin 9000s processor developed specifically for Huawei by SMIC. Gallagher was quoted as saying SMIC may have violated US sanctions, as this chip likely could not be produced without US technology. Hua Hong Semiconductor, China’s second largest chip foundry, tumbled 4.8%.

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