HiKey960 for FreeBSD

I want flushing FreeBSD on the board!

How to do?

AFAIK FreeBSD has not been ported to Hikey960 so I think you would have to port it yourself. There a port for hikey620 that you could use as a starting point:
https://wiki.freebsd.org/arm64/HiKey

Thanks your reply my question.

I will be try.