It's the Type 071 amphibious transpot dock Longhushan, hull number 980, launched in 2017. The video shows thick black smoke emerging from the full length of the ship, suggesting that the fire is widespread and the crew hasn't been successful suppressing it.
https://twitter.com/AlexandruC4/status/1...6210104644
https://en.wikipedia.org/wiki/Type_071_a...sport_dock
https://twitter.com/AlexandruC4/status/1...6210104644
https://en.wikipedia.org/wiki/Type_071_a...sport_dock