If you only have about a few hours of time, i will recommend to
take a look at Yau Tsim Mong District.
Reasons for this:
1. There are many tourist attractions located in the district of
Yau Tsim Mong District, such as museum,
2. This district is easy access. Bus, taxi and MTR is
everywhere.
This district is enough for you to spend several hours to
explore.