One of their repos has a bunch of patches/scripts to be able to run Android on the CPUs[1]. (XuanTie C910)

The linked video (https://occ-oss-prod.oss-cn-hangzhou.aliyuncs.com/share/risc...) is impressive! Open source Android running on an Open Source CPU.

[1] https://github.com/T-head-Semi/riscv-aosp