Tobacco was the most valuable cash crop produced in the 1700s until the invention of the cotton gin. Large quantities of it was produced rapidly.
Himalaya's: Isolated China.and gave protection, and water, and minerals.
Trading : As far as I know from when the silk road started ( but this could be wrong)
<em>POPULAR EXPORTS : </em> Jade, Silk, Paper, Porcelain.
<em>Popular Imports : </em>Spices, Glass, AND ALSO : Buddhism ( from india)