Pakistani living in China

If you go there for tourism purpose, you need to provide copy of passport, the application form affixed with a passport-style photo, residence permit in China, proof of your financial support, transportation and accommodation arrangement, and your travel plan. Next, submit the application to the liaison office of HK government to apply for Hk visit visa.

Where is this liaison office of HK ? can we apply online?

Beijing Office Address: No.71, Di'anmen Xidajie, Xicheng District, Beijing, China. I'm afraid you cannot apply online.