I AM PAKISTANI NATIONAL, CAN U PLS ADVISE HOW I GET HONG KONG VISA AND FROM WHERE,

You can submit the visa requirements to China embassy or consulate in Pakistan or post them to Hong Kong Immigration Department to obtain a Hong Kong visa. Different types of visas require different documetns. Here is a list of the requirements for your reference: http://www.immd.gov.hk/ehtml/hkvisas.htm