malaysia roaming data will bypass their local restriction. but using roaming to access china related services and sites will be sllooooowww.... coz the traffic go from china to malaysia then back to china.

install the international alipay if you are going to restaurant coz when order need to scan their menu etc...

if you u buying things to pay only, tng can d. will work there like normal alipay


international alipay you need to verify your id if you want some of the restrictions off(cant remember what d) but there is a merchant level cap where there is a max amount you are allowed to pay to 1 particular merchan.(i tried to pay my hotel using alipay and hit the cap about 4kRMB when my hotel bill is about 20k rmb. had to use tng to pay the balance which dont seem to have a transaction or a merchant cap)

hope this helps