The Communist Party's mouthpiece People's Daily warned in an editorial on Thursday that China must break monopolies over core technologies and standards and remain untethered to other countries' technology supply chains.
The commentary, aimed apparently at Silicon Valley in unusually stark terms, comes one day after President Xi Jinping called for "more fair and equitable" governance of the internet at the opening of the state-run World Internet Conference.
The conference this week has highlighted US and China's competing and increasingly entrenched views about the internet, trade and cybersecurity, and the potential for these issues to become an enduring irritant in bilateral relations.
Xi reiterated on Wednesday the Chinese position of "internet sovereignty" over its 700 million Internet users, while other top leaders declared the country's willingness to work with the global industry for mutual benefit if security could be assured on China's terms.
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Human rights groups have voiced concern about police overreach while US firms have lobbied against the measure, saying it would wall off China's internet and unfairly hamper their access to the market.
Other Chinese proposals in recent years have effectively discouraged state-backed companies and agencies from buying foreign products out of cyber-spying concerns. China has also encouraged its state-backed sector to develop or outright acquire technologies in strategically critical industries like semiconductors, which it believes to be an Achilles heel of the Chinese economy.