Easy to buy bitcoin
1. Press Start
2. Scan Wallet QR Code (You can also shapeshift too, if you want another ALT coin)
3. Insert cash (HKD)
4. Take screen capture of receipt
Some other notes
Theres at least 20 USD spread (~ 155 HKD) for a full BTC if you want to do it this way.
You lose about 9 HKD per 100 HKD
Good for small amounts