hi am in hongkong on 12feb till 16feb for vacation, where i should go for shopping and sightseeing?

Since you will have four days, I think you can cover most of the places in HK. If you have kid, the Disneyland is suggested, otherwise, it is not suggested to go.
Besides it, the Ngong Ping 360 & Ngong Ping Town, the Lantau Island, the Lamma Island, the Ocean Park, the Repulse Bay, the Victorial Bay, the Causeway Bay, the Peak, the Temple Street, the Star of Avenue and the Tsim Sha Tsui area are suggested to go.
Among these place, the Causeway Bay and the Tsim Sha Tsui area are the paradise for shopping. It is suggested to prepare the information, so that you will not feel lost when you are there.