BEIJING, April 28 (Reuters) - China's cyberspace administrator has ordered ByteDance's video editing apps Jianying and Maoxiang, and website Jimeng AI, to comply with rules on labelling AI-generated content, the Cyberspace Administration of China said in a statement on Tuesday.

-- The three platforms did not effectively implement required AI content identification measures and have violated the country's cybersecurity law and relevant rules, the regulator said.

-- Authorities summoned, ordered rectification, warned, and penalised those responsible, the statement said, without giving details.

-- Platforms must strictly observe legal requirements on AI-content labelling, it said, adding that regulators will continue to strengthen oversight to "concretely protect the public interest and support the healthy and orderly development of AI".

-- China in March 2025 issued requirements for the labelling of AI-generated content, which went into effect in September.