If you haven't signed any lease for apartment, or you still have choices, then keep an eye out for the SURROUNDING streets.... Keep a look out for streets/alleys where there are mini-van (16 seaters), then live near these vans. They usually are near local wet-markets.
the Red-top vans tend to be more efficient
HKU is on Pokfulam, but the next neighborhood is SaiYingPun and ShekTongTsui, a more mature area that is well served by these mini-vans. I am at ShekTongTsui, and I can get to Shatin via these mini-vans in 30minutes, and "walking" to HKU takes 10minutes of riding up a series of the escalators, and I will hit the HKU West Gate.
So your journey could mean:
Mini-van : 35 minutes from home(Shatin) to ShekTongTsui
Walk : 10 minutes from STTsui to HKU West Gate
Then add whatever time you need to work your way to the faculty/classroom... you can make it door-to-door in less than one hour.
Alternately, there is a series of GREEN-top vans that pickup from HKU East Gate, that get you to the MTR(cross harbour KCR HungHom) in twenty minutes, which then allows you to get on the trains... so living near the MTR/KCR stations can be a good choice.
If you need more info, please PM me, I can take you for field trip to see the van routes available for you.

Originally Posted by basu:
Don't have any idea which part of Tai Po... Let's see .... Thanks once again