Merchant APP
count 60 seconds
scan the dynamics QR code
input amount&request to get the dynamic QR code
request dynamic QR code
display the dynamic QR code
response dynamic QR code
INQY(start from 2s，every 5s，end in 62s)
Issuer
INQY(every 5s，end in 62s)
User APP
send payment
QR processing
CANC success
no response in 65s
no response in 65s，send CANC
Mizuho GW
