how can we go chungking mansion from the peak ?

I suggest you take the peak tram down to Central first. At Central MTR station, take the Tsuen Wan Line to Tsim Sha Tsui Station, which is next to Chungking Mansions.

thanks Alan , anyone familiar with chungking mansion ?i've read bad reviews about the palce , is it safe there? ive already book a room at hk downtown backpacker

Hey, there are many hostels on the mansions, as well as many people from different areas. It may be noisy, but safe. Some hostels only have public bathrooms as I know. If you travel alone, keep an eye to your belongings and don't walk around the blocks at late night in case.