Like he/she said...Quite surprise you dont know about this and never bother to ask.
If you are using posb/dbs, your best bet is to locate DBS bank in Taiwan with atm facility, provided you remember to enable the magnetic strip on your atm card for oversea usage.
For some people i came across, they carry with them a few hundreds in USD for emergency use.
Just sharing ma...
Note can liao.
Tia gong gbp also accepted.

