I build machines in China today and studied ancient Chinese history. Can't answer off-hand but Science and Civilisation in Ancient China is the go-to reference

I build machines in China today and studied ancient Chinese history. Can't answer off-hand but Science and Civilisation in Ancient China is the go-to reference text for these sorts of questions. It is a huge, many-volume series still being authored covering evidence of disparate types of scientific advancement in Chinese history. I believe the multi-part Volume 6, Biology and Biological Technology will have the answers you seek, at least two parts of which are available on libgen. Perhaps someone with more time can post a summary here.