Nina Xiang is managing director at TH Capital, an investment advisory and asset management firm. She is the author of "US-China Tech War: What Chinese Tech History Reveals About Future Tech Rivalry."
Huawei Technologies' return to the smartphone market last August with a 5G model competitive with Apple's iPhone came as a surprise to U.S. policymakers who thought that Washington's sanctions on the company had largely knocked it out of market contention.
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