Sipeed

https://m.aliexpress.com/store/912570077 Electric robot store

Sipeed Lichee RV Dock Allwinner D1 Development Board RISC-V Linux Starter Kit  $10, pi zero alternative

https://www.youtube.com/watch?v=613yEF6SrNo

https://www.youtube.com/watch?v=o2dXIO8-pvg