I bought my hardtail frame from OG-Evkin... Looking back I think they advised the wrong size and I should have gone a size smaller, so please do your own research.
The CF-052 frame also seemed to be a rebranded frame you could find from other sellers (tantan FM699), so maybe that is also the case here?
I must say the frame itself was very nice and the paint flawless... Although I would rather go with an unbranded frame if I had the choice...