What was one way chinese tried to protect themselves during the warrings states period?​

They created alliances with other nations. They built barriers like the Great Wall of Qi. They pitted feudal leaders against one another.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.

because the early people found out about it.