Most only got that Melina doesn't live in Shenzhen anymore as it's written in her Fandom page :
https://melina-j.fandom.com/wiki/Melina_J , even if she hinted about it in videos/recordings. (Side note to the people who have made the pages : please make sure to log in and edit something every now and then, or else it will be deleted again !!!).
Anyway, Melina hasn't been living in Shenzhen since May 2021. She is said to live in Hangzhou now (although, others are saying Qingdao, where she spent time at her good friend house in 2016 already.) Either way, she is not in Hongkong right now (duh...) and not in Shenzhen either.
We of course pray and hope everybody there is fine and that everything gets better soon. But Melina is not there atm.