No, it was introduced by the Europeans.
James Hudson Taylor, Robert Morrison, and William Burns.
The establishment of spheres of influence in China by Europeans! :)
The Asians wanted to stop trading with the Europeans basically because the Europeans had nothing they wanted or needed. The Opium war was what forced China to open up trades Britain.
India
Canton
The opium war mainly began because of the British and China having an opium trade for tea. The British would get there tea if China got there opium. but the cause of the war was that china wouldn't accept opium anymore, and the british wern't okay with that.
selling opium
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.
India
Great Britain would not stop its merchants from selling opium in China.
The British wanted to trade opium for China's resources.
The British wanted to trade opium for China's resources.