What is the minimum and maximum amount of each transaction?

VISA/MasterCard – Min: $1/Max: $99999999.99.
AliPay – Min: $0.1/Max: Depends on consumer′s account.
WeChatPay – Min: $0.1/Max: Depends on consumer′s account.
Tap&Go – Min: $0.1/Max: $38,000.
FPS – Min: $0.1/Max: Depends on consumer′s account and HKMA′s limit of $1,000,000.
Octopus – Min: $0.1/Max: $1,000.