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Beijing has banned semiconductor research firm TechInsights from working with or receiving data from Chinese entities, in a move that could add to the opaqueness of the country’s chip industry.

China’s Commerce Ministry, citing national security concerns, announced Thursday that TechInsights was designated an “unreliable entity,” which prohibits Chinese individuals or organizations from sharing information with the Canadian-based company.

TechInsights is well known in the global tech space for its in-depth coverage of Chinese-made chips and was among the first to report breakthroughs by companies like Huawei Technologies.

Beijing’s crackdown on TechInsights came less than a week after the firm revealed that a breakdown of Huawei’s latest artificial intelligence chips found components sourced from outside mainland China.