It’s more easier and more direct than arduous overland routes
The freedom of Bureau I think
Answer:
Agricultural yields were about 2 tan (a unit of about 110 pounds or 50 kilograms) of grain per mu during the Song dynasty, compared with 1 tan during the early Han and 1.5 tan during the late Tang.
Explanation:
Aboriginal those people are savage
Either tokens, tributes or duties. Hope this helps!