I don't know any Chinese, though I've been using google translate and chatgpt for translations of that game on the Castlevania Wiki for a while now. I didn't see anything about a beta, but it does look like have some new stuff to show us. I've never seen the town depicted in the video before. I think they're just showing off the content in the video, rather than a new beta as far as I can tell. They wanted people to fill out a questionairre.
Here's the ChatGPT translation for the main post (Apr 18 2024) if you haven't already seen an auto-translated transcript:
"Dear Hunters, hello everyone! Today, we’re bringing you a preview of the latest main city! After a two-year wait, it's finally making a fresh appearance. Are you still waiting?
Please fill out the questionnaire below to help us better understand the thoughts of all our hunters~"
There was a beta, but that was a few years ago. Did you have any specific text you surmised might be talking about a new beta?
That's really good to hear that there's new progress on it and they're at least thinking about still releasing it. I found some of the story fascinating and a waste if they never got an actual release.