Digital payments startup QFPay announced today that it has raised $20 million in new funding led by returning investors Sequoia Capital China and Matrix Partners. MDI Ventures (the investment arm of s
<a target="_blank" href="http://www.qfpay.com">QFPay</a>'s card reader admittedly looks a bit clunkier than its U.S. or European equivalents Square or iZettle.
It looks like a wonky, old calculato