What concerns did zhang han have in trading with foreigners i need to pass and explain asap

Zhang Han famously wrote on the disadvantages of a tribute system. During his time, China had a limit on national and international trade regarding what kinds of goods could be traded and at what amount. Zhang Han argued that China should lessen this trade limit to make a more free efficient economy to let Chinese citizens prosper and for foreign traders to be attracted to China’s enormous land packed with precious resources and knowledge. Along with this, Zhang Han also added that the infamous piracy would inevitably regress (start to stop) because the reason for pirate merchants was the states harsh limit on its own citizens’ trade opportunities. Good luck passing bro.