new board support ZeroOne x6

[ZeroOne-Aero]

Hello, our flight control is based on the V6X standard, and board_types.txt,pixhawk-standards and pab_manifest.c were merged before. Now I copied the px4/fmu-v6x folder and modified it.The firmware I modified is written into our flight control board, and the sensors are all normal. I have the following questions:

1. Every time I modify the code, I execute make zeroone_x6_bootloader and make zeroone_x6_default, and then connect the debug port of fmu through STLink to write Zeroone_x6_bootloader.bin. Then connect QGC or MP to write zeroone_x6_default.px4 via USB port. Is this process correct?
2. Is our CONFIG_CDCACM_PRODUCTID 0x15E0 (5600)?
3. How do I get this value from CONFIG_CDCACM_VENDORID?
4. Does the bootloader of the flight control board need to be replaced when PX4 firmware and APM firmware are used respectively? 5, After burning the bootloader, and then downloading the Firmware through the ground station, an ERROR will be reported: firmware not suitable for this board fw: 53-board :101, what is the reason? 6, the remote control channel can not be identified, what is the problem? 7, can compile and generate firmware with bootloader?