Why Developer's Called c9ltechn to C9 Hk & Chn both Devices

[Shozaf.shah]

I wanna ask to seniors that what is the Difference between C9 Pro China And Hong Kong Variant C9 Pro Hong Kong Variant Called TGY and HK like this SM-C9000 C9000ZHU1AQG2
And C9 Pro China Variant Called CHC like this SM-C9000 C9000ZCU1AQI2 but when the Seniors and Developers Guide Us About Root This Device So They Called C9ltechn Both Devices China And Hong Kong why..?

 

[travis82]

Chn variant means hk and china its the same phone just the firmware is different. HK has google mainland china no google but the models are the same.