China's updated technologies export rule has given Beijing "a precise lever" to raise concerns over technology transfer deals that could jeopardize the nation's due rights and the lawful interests of Chinese companies overseas, according to experts.

Beijing unveiled a newly revised catalog of technologies prohibited and restricted from export on Friday, incorporating new restrictions on artificial intelligence-related technologies, including algorithm-backed services such as those provided by ByteDance, the parent firm of video-sharing app TikTok.

That means technologies new to the list, including text analysis, content recommendation, speech modeling, voice-recognition and personalized recommendation pushes, are subject to regulatory approval before their potential export or sale.

"The updated rule, while not necessarily taking aim at the TikTok case, gives Beijing the legitimacy to act on similar cases with reasonable concerns and major national interests," said Shen Yi, professor and director of the Research Institution of Global Cyberspace Governance at Fudan University in Shanghai.