It's crazy visiting China and southeast Asia, seeing entire hill ranges terraced (in the same way that farm fields would be divided in the UK or US), and realizing just how old those terraces are.
Makes you appreciate how old of a technology farming is.
Andrew Millison has a great video about designing with slope. This includes a brief discussion about the steep slope found in the rice terraces of Southern China
https://en.wikipedia.org/wiki/Terrace_(earthworks)