[Q] How to unbrick without hboot and recovery?

[CYRU5]

My device is HTV31, it was bricked and cannot enter the download mode and recovery mode.
The RUU method is not working and I tried fastboot flash (e.g. recovery) but after flashing it cannot enter recovery mode.
In cmd I cannot see or change the cid and mid.
Just want to unbrick and reflash to stock.:crying::crying:

bootloader unlocked
s-off

fastboot getvar all
(bootloader) version:0.5
(bootloader) variant:MTP eMMC
(bootloader) secure:yes
(bootloader) version-baseband:
(bootloader) version-bootloader:
(bootloader) max-download-size: 0x20000000
(bootloader) partition-type:cache:ext4
(bootloader) partition-size:cache: 0x10000000
(bootloader) partition-type:userdata:ext4
(bootloader) partition-size:userdata: 0x5e0000000
(bootloader) partition-type:system:ext4
(bootloader) partition-size:system: 0x118000000

fastboot getvar mid
mid:

fastboot getvar cid
cid:

Hope anyone can help
Thanks