Are you going to buy one? Or more?
If so, would be nice to open a review thread here.
One would want to draw a parallel between the Chinese companies producing these lenses today, and post-war Japan. There is a huge difference: The economy of Post-War Japan was saved by their camera industry, and other industries that could turn out products that used little material and where labor intensive. With China- the current crop of lens makers are aiming at a small but affluent market of camera enthusiasts. The lenses being turned out represent good performance for the money, but are not as good as the products from Leica, Cosina, and Zeiss.
@Duofold RF has posted that among the Chinese forums that the reception has been negative. SO- watching this market, will be interesting to see of a Chinese company can produce a lens that is as good as the 50/1 Nokton or 50/0.95 Noctilux, and if so- what the price will be. It will need to be an original design, "Optical Prescription" (as my Optical Engineer called it) not just a copy of another lens, as is the LLL 50/1.2, to gain respect. For their domestic customer, it seems they will need to produce a world-class lens, not a less expensive lens that is fun and cheap enough to pick up on easily disposable income. Most of the Chinese lenses I bought fall into the latter category- TTArt 50/0.95, 7Art 50/1.1 and 75/1.25, and Mitakon 90/1.5. I sold my Canon 85/1.5 for more profit than all of those lenses cost together.