Be sure to check out the
WikiPost (the first post in this thread) -- I started maintaining it a few months ago. There are number of Chinese brands listed. The two current (2025) Geekon 5K displays probably use BOE panels, for example. Also the new (2025) Fshuo. The new (2025) dual-mode (5K 72Hz, 1440p 144Hz) RichVision RV200 Pro Max might also be BOE, I don't know.
CnHopeStar specializes in OEM and ODM. They don't really market their own brand -- sales are aimed at OEM and ODM B2B "partners" -- probably some of the Chinese brands listed in the WikiPost.
They have at least two websites:
cnhopestar.com is the most recent, but the original is
ihopestar.com -- neither is aimed at consumers, which is why you don't see it in the WikiPost.
The company also has at least two English names: Shenzhen Hopestar Sci-Tech Co., Ltd. [深圳市希之望科技有限公司, the official Chinese business name] is the original, and Hopestar Guangzhou Electronics Co., Ltd. is another. Both exist on Alibaba:
chinahopestar.en.alibaba.com
gzhopestar.en.alibaba.com
I think the panel you are talking about is also seen on cnhopestar.com (listed under "Gaming Monitor"):
OEM-27-Inch-5k-60Hz-Mirror-Screen-Business-Designers
Source-Factory-27-Inch-5K-60Hz-Mirror-Screen
"Mirror screen" usually does mean a glossy screen. You'll also note it is BOE, 300 nits, and 3000:1 contrast.
Those specs are somewhat different from the Alibaba listings you found:
Hot-Selling-BOE-Panel-27-5K_1601400487915
Hot-Selling-27-5K-BOE-Panel_1601521213810
Once you begin a dialog with them, you'll need to ask a lot of questions to make sure you are getting what you think you are getting. I'd be interested to hear what your experience is like.