The Chinese really have ways.

With my Western edu, it never occurred to me that a cockroach would have any value.

In China, the grow and harvest American cockroaches by the hundreds of millions.

They are tasked to get rid of city food wastes:

https://www.thestar.com.my/news/nation/2018/04/29/chinese-farmer-unleashes-300-million-hungry-cockroaches-to-eat-food-waste/

Then when their life span and usefulness is near done, they are then sent to Chinese pharmaceutical companies who convert them to useful Traditional Chinese Medicine.