Silk Export in B.C. 5th century.from China/Yunnan

Yunnan/ China *****

The southern silk road is one of the 3 major silk route for merchant to transport precious silk from China to Europe and other places. It was highly priced. Silk was more valuable than gold of compared by weight/mass.

Sickness is with human for thousand of years. So, the story of silk route, the rich income of silk merchant created wonders. Did they find Yunnan southern silk route more dangerous? Did they have more sickness? How about the silk? fungus, mould can destroy silk protein. Hot and humid climate is ideal for fungus to grow. Southern Yunnan is situated at subtropical region, which is hot and humid.