Concept:
Collect green points then exchange to discount code
Coupon -> Points
One time coupon, 1 person per coupon must use in 1 min
Coupon: Code or QR
How to get Coupon:
Use NGV bus instead of car earn points
Green energy event
Use green energy, save the world
Collect Stamp from products
Pages:
Main,Register,Profile []
Coupon use, list of type(category) []
list of what u can exchange, use points []
Generate coupon (Staff only), QR [XE]