How to safely shut down or force shut down Huawei devices

Huawei Honor 3C 4G Huawei Honor 3C 4G
Huawei Honor 3X Pro Huawei Honor 3X Pro
Huawei Honor 6 Huawei Honor 6
Huawei Honor 3C Play Huawei Honor 3C Play
Huawei Ascend Mate7 Huawei Ascend Mate7
Huawei Ascend P7 Sapphire Edition Huawei Ascend P7 Sapphire Edition
Huawei Ascend G7 Huawei Ascend G7
Huawei Ascend Y550 Huawei Ascend Y550
Huawei Ascend G620s Huawei Ascend G620s
Huawei Honor 4 Play Huawei Honor 4 Play
Huawei MediaPad T1 7.0 Huawei MediaPad T1 7.0
Huawei MediaPad T1 8.0 Huawei MediaPad T1 8.0
Huawei MediaPad T1 10 Huawei MediaPad T1 10
Huawei Honor Holly Huawei Honor Holly
Huawei Honor 4X Huawei Honor 4X
Huawei Ascend Mate7 Monarch Huawei Ascend Mate7 Monarch
Huawei Honor 6 Plus Huawei Honor 6 Plus
Huawei Ascend GX1 Huawei Ascend GX1
Huawei Ascend Y221 Huawei Ascend Y221
Huawei Ascend Y520 Huawei Ascend Y520