The Philippines.
china as and is a main trading country.
I think you meant to ask: What country began trading opium with china? The answer to that is: England. They trade opium with china in return for tea.
the Portuguese
Nathu La Pass
Nathu La Pass
China and japan.
It would depend on which country you are referring to that conferred such a status on China
There currently does not seem to be a large amount of trading exchange between the US and China in terms of Natural Resources. China currently uses US natural resources, but there is not much available for China to provide for the US.
The Chinese inventions help china to develop wealth and prosperity by trading things with other country.
China
The country between Russia and China is Mongolia
Canada is one of America's important partners in trading and China too