This isn't about homosexuality being called a mental disorder was supported by the government, this is just about what's printed in some book sold in China

"In 2017, XiXi had sued Jinan University Press and a company owned by retailer JD.com for publishing and distributing factually incorrect content in the 2013 book on mental health education for university students."

This is about a lawsuit of a book company, not about laws against homosexual people... you idiot

"A Chinese court has upheld a ruling that a textbook description of homosexuality as “a psychological disorder” was not a factual error but merely an “academic view”."

That doesn't mean that this is the commonly held view in China or that gay people in China are diagnosed with disorders. Actually familiarize yourself with the facts.