Huawei also unveiled new smartphones in recent weeks that use advanced chips, which analysts say are domestically made. "These surveillance chips are relatively easy to manufacture compared to smartphone processors," said the source familiar with the surveillance camera industry's supply chain, adding that HiSilicon's return would shake up the market. A key factor is that the company appears to have worked around U.S. restrictions on chip design software. HiSilicon mainly supplies chips for Huawei equipment but has had external customers such as Dahua Technology (002236.SZ) and Hikvision (002415.SZ). The United States has no evidence that Huawei can produce smartphones with advanced chips in large volumes, U.S. Commerce Secretary Gina Raimondo said on Tuesday.

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