When I update to EMUI 9 I lose unlocked bootloader? - Huawei P Smart Questions & Answers

Hello guys,
I have FIG-LX1C432B170 device with unlock bootloader. I install Twrp, create backup and install phhusson's ROM but i miss Emui ROM. I recover backup and when I relock bootloader the device is stuck in Huawei logo and show erecovery every start. I try install stock ROM with Firmware Finder + DNS combo but I get "getting package failed info" error. But the question: when I get Emui 9 and install with normal update mode I lose unlocked bootloader and the device will working good?
Thank you for the helping and sorry my English ?

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https://forum.xda-developers.com/8-lite/how-to/guide-unbrick-huawei-p8-lite-2017-honor-t3766652
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If you haven't tried this yet.
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