Britain needed a country to trade with, and they decided china because:
A. China was large and their relations were neutral (unlike other countries)
B. There was silk, porcelain, and TEA.
C. there really wasn't another country that had goods they really wanted
There was only one problem, in china, there was many trade regulations that stopped Britain from trade a lot, and they only accepted silver as payment, but for now, trading develops slowly.