Mi 5c is the first smartphone to use Xiaomi's own chipset
 

After wowing the crowd with the gorgeous Mi MIX last October, Xiaomi is now back with a more humble phone but with a twist. The new Mi 5c is the first smartphone to carry Xiaomi's very own chipset, the octa-core Surge S1, and it's hitting the Chinese...

https://www.engadget.com/2017/02/28/...i-5c-surge-s1/