http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO2#UbuntuCore_16.04
Follow instructions to download image - nanopi-neo2_sd_friendlycore-xenial_4.14_arm64_20181011.img
Write it to SD card (8 GB Min) with Win32 disk imager and put it into NanoPi. Connect to network, boot up and login with root/fa