How a kiss with a pilot in an elevator changed this man's life and could help fight LGBTQ discrimination in China
https://edition.cnn.com/2021/03/26/china/china-southern-flight-attendant-trial-lgbtq-intl-dst-hnk/index.html
Though his boss told him that his sexual orientation is against core socialism values, there is no word in those values which regulates people's sexual orientation.
I guess there are two reasons why Chinese Communist Party bans LGBTQ.
The first one is the countermeasures against low fertility rate. If it becomes a more serious issue, the government will impose tax on couples without a child. But, LGBTQ can be an excuse for not having a child.
The second one is prevention of anti-government movement combined with LGBTQ's movement.