can't root after lollipop update..

hello guys plz help me i can't root my huawei CHC-u01 after lollipop update ...i was root able before the update using just kingroot apk...
but now i can't root it using any software or app like frameroot, oneclickroot,etc even the pc one are not working...so plz help me the history is i unrooted my device before the update, and wiped my device to factory reset after update to clear internal memory.. and tried to root it then it failed ..so plzz help me to root the device or downgrade it back to emui 3.0