How to build ROM for Lenovo Tab 3 7 using sources

Hi everyone.

I want to build own firmware for Lenovo Tab3 7 tablet. Lenovo has published "code" to open source: http://ift.tt/2abG5ri

But I can't understand how I can build firmware. Should I copy sources to AOSP?

Maybe smb has tutorial or experience with other Lenovo firmware?

Thanks in advance.

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