Thanks for the link. Some one-star reviews were amusing. Even a five-star review managed a veiled insult: "Bought to give away, and no doubt that was a great choice." Funny.It is probably just this https://www.aliexpress.us/item/3256804564732482.html which I tried. It's not a bad watch but the fitness tracking on it sucks.
Another review linked to a youtube unboxing:
Fascinating stuff. Crude UI, but it's still quite amazing what's been cobbled together.