What is feudal comprador culture?

Compradors are a combination of "buying and selling" and "handling". The comprador is actually an agent, acting as an agent for the client.

However, in the late Qing Dynasty, the comprador not only acted as an agent for buying and selling business, but also acted as an agent for all the affairs of foreigners in China. To put it bluntly, the comprador at that time was a slave (the "slave" here refers to that era, and other times may not understand it that way).