Give all raw materials to there country. Let them make finished or manufacturing goods, them sell them back to the colonies.
Here this is an example, one word, Trump
The First
Sino-Japanese War was the event that opened Asian nations, particularly
China, to trade with Europe.
<span>The </span>First Sino-Japanese War<span> (1 August 1894 – 17 April 1895) was fought
between the </span>Qing
Empire<span> <span>and the </span></span>Empire
of Japan<span>, primarily over influence of </span>Korea. <span>After
more than six months of unbroken successes by Japanese land and naval forces
and the loss of the port of </span>Weihaiwei<span>, the Qing
government </span>sued
for peace<span> <span>in February
1895.</span></span>
