Since different types of Android devices have slightly different versions of Google Wallet, the steps for adding your card may differ slightly, however, these are general guidelines that you can follow to add your card to your Google Wallet:
 

• First, download your HiHello QR code or take a screenshot of it
• In Google Wallet, tap + Add to Wallet:

• Select Photo from the list of options:

• Choose the photo of your HiHello QR code from your device
• Tap Next:

• Add a name and an optional description for your pass then tap next:

• Once you've added your photo to your Google Wallet, you'll be able to tap it and quickly access it when you open Google Wallet: