To provide the money-changing service for Chan, the Zhous need to stockpile Hong Kong Dollars.
All of the latter seem to be engaged in the money-changing business.
The whole of their science was comprised in money-changing and usury.
There he saw a money-changing window which was open, so he planked down a five-pound note and got two-hundred-and-ten lire.
He put his cash-box away, slammed his safe shut, and began to open his shop for his ostensible business of money-changing.
