How to Downgrade from android 5.1.1 to 4.4.2

Hi guys , I just updated my honor 6 to android 5.1 and wanted to root it , but its very very dificult to do . I decided to downgrade to 4.4.2 and easily root by kingroot . The problem is hwauei site don't allow me to downlaod the downgrade package b500 . Anyone can upload it here ???? One more thing , after downgrading to b500 , can I downgrade to build b393?? Because I have it downloaded.