Yang Kayli anthem desecration (楊凱莉, 2019)

Yang Kaili (楊凱莉, alias 莉哥): "Yang Kaili, or "Lige," was the only one of the four banned live-streamers to have broken the 2019 live streaming law mentioned at Live streaming (直播).

During a live-streaming show on Huya in October 2018, Yang was seen singing China’s Chinese National Anthem (义勇军进行曲, 1978), "March of the Volunteers," in a jovial tone while waving her arms like an orchestra conductor"

So basically it was somewhat silly, but also cute and likely not intentionally rebelious at all,

2018 https://www.bbc.co.uk/news/world-asia-china-45859650 Yang Kaili: China live-streamer detained for 'insulting' national anthem

https://www.youtube.com/watch?v=4LKONlosqFM It was just a very small section, as part of the stream opening.