I got the impression that this CStar 8X20 monocular is Russian rather than Chinese, but dunno its heritage.
I got it many years ago and it still works good as new, They are still fur sail apparently--
It is a nice daytime scope considering that it is such a tiny little cheap gadget. Difficult to imagine a practical monocular any smaller than this.
I've carried it on rare air trips for high-altitude sightseeing, and carry it on a neck strap on each trip to the firing range to observe the hits on up to 50 yard targets. Not powerful enough for my eyes to see bullet holes on 100 yard targets.
It focuses pretty sharp, and the Apparent Field of View is PERHAPS 40 or 50 degrees if the tiny eyepiece is almost touching the eyeball. At least with this design, it is easy enough to get the tiny eyepiece nearly touching the eyeball.
When shooting with goggles over the eyeglasses, and the monocular has to be a long distance from the eye-- The AFOV is tiny but it still isn't too much hassle to get the small view centered on a 50 yard target.