The stock NXT-AL10 firmware lacks Google Play Services. After flashing any official C00 build, you must sideload Google manually:
: The NXT-AL10 is the Chinese "All Network" edition of the Mate 8. huawei nxt-al10 firmware
Flashing firmware carries inherent risks. Ensure your device is the model (check under the battery or in Settings > About Phone). Flashing firmware intended for a different model (like NXT-L29 or NXT-L09) can hard-brick your device. Proceed at your own risk. The stock NXT-AL10 firmware lacks Google Play Services