I was building from source for aosp for hikey970, following https://www.96boards.org/documentation/consumer/hikey/hikey970/build/aosp.md.html
It has currrently build issues:
[100% 919/919] writing build rules …
build/make/core/Makefile:28: error: overriding commands for target `out/target/product/hikey970/system/vendor/lib/libc_secshared.so’, previously defined at build/make/core/base_rules.mk:417
Meanwhile, if the source code is avaiable for the factory image(https://www.96boards.org/documentation/consumer/hikey/hikey970/downloads/aosp.md.html), it would do much of a help.
Board based on the Kirin 970 - HI3670 Application Processor
More info: http://www.96boards.org/product/hikey970/ (Website coming soon…)
Buy now: https://www.seeedstudio.com/HiKey-970-Development-Board-p-3046.html