score:4
Update: OP's banker, HSBC starts to issue the brand new Visa PLUS ATM chip (IC) card since October 2013. The PLUS card will be linked to holder's current (cheque) account so for those only have a saving account, they will need to open current account or upgrade to the integrated account first.
This part of the original answer is no longer applicable since October 2013 and only kept for reference.
HSBC (Hong Kong) has decided to provided ATM cards for PLUS network again in the next few months, so your best bet is to call the HSBC customer services to see if they can issue the good old PLUS ATM cards to you before your departure.
As an alternative, you may request emergency encashment service from HSBC if you need cash in your trip.
If you have saving accounts in other banks, you may also ask if they have PLUS ATM card. Although my Hang Seng Bank ATM card is using the UnionPay IC chip, there is a statement at the back claims the card could be used in the PLUS network. Some people also comment that Standard Chartered Bank still stick to the Cirrus / Plus network.
Upvote:2
I used my Union Pay (Bank of China) card in the Berliner Sparkasse ATM without any problem.
January 2017.