Can anyone help me with this asap, thanks in advance! how was china influenced by geography focusing on these boundaries below:

-political boundaries (ex. borders w other countries)
-linguistic boundaries (language differences compared to neighboring countries)
-economic boundaries (within the country or compared to neighboring countries)
-social boundaries (within the country or compared to neighboring countries)

don't need to answer for all boundaries if don't know, at least one will help. thanks​