This is interesting! From my understanding I I wouldn't have called this "rediscovering ancient knowledge", given Cinchona tree bark was exported from South Am

This is interesting! From my understanding I I wouldn't have called this "rediscovering ancient knowledge", given Cinchona tree bark was exported from South America from the 17th century onwards, and the cultivation of trees elsewhere to lower the price was quite a big enterprise. I understand (and love) that this is written from the Chinese perspective, but it would be good to understand whether this rather huge undertaking had any effect on the researchers' efforts. Or whether it didn't, for some reason, and why that might be.