The ZUK Z1 packs a 5.5" 1080p display and runs on the last year's everybody's favorite Snapdragon 801 chipset with 3GB of RAM. The rest of its specs include a 13MP main cam, an 8MP selfie snapper, 64GB storage, LTE connectivity, a fingerprint scanner and a beefy 4,100 mAh battery. There is also a USB Type-C port.
Lenovo ZUK Z1 runs on custom Android Lollipop Cyanogen OS 12.1.
I am not sure who is opting this business model, however like Micromax, Lava have different brand for Cyanogen based phones, Lenovo created ZUK Company for the same reason.
Price: 15000 to 18000/- Only assumption based on currency fluctuation