Hi IM Malaysia would like to apply VISA to SZX in HKG, how long for the VISA approval and the ,cost?

If you're already in HK you can go to any travel agent, but if you're still in Malaysia, you'd better apply in Kuala Lumpur. Single entry is RM30 + RM28 (service fee), and double entry is RM50 RM28 (service fee). Normal application is four working days, but you may request for "rush" i.e. within the same day which you may need to pay extra.
Wan