Lenovo runs three smartphone brands semi-independently - its own Vibe line, the Moto phones and the ZUK brand. It has considered many different ways to brings Vibe and Moto together (to leverage Motorola's better brand recognition), but in a surprising move it has ported the custom ZUK interface to Moto phones. The Moto Z flagship and Moto Z Play mid-ranger specifically, currently being used by 25 beta testers. It seems that (for now at least) only Moto-branded phones sold in China will use the ZUI software. ZUI software beta-tested on Moto Z devices Recently, Lenovo bumped up...
Source: http://www.gsmarena.com/moto_phones_sold_in_china_may_soon_run_zuks_custom_software-news-22500.php