A cameroonian based in China Guangdong applying for Hong Kong Visa

You can either mail your application to Immigration Division of the Beijing Office of the Government of the HKSAR (71, Di'anmen Xidajie, Xicheng District, Beijing 100009) or Hong Kong Immigration Department (Receipt and Despatch Unit, Immigration Department, 2/F, Immigration Tower, 7 Gloucester Road, Wan Chai, Hong Kong) to obtain a Hong kong visa. What kind of China visa are you going to apply for? Different types of visas asks different requirements. Here is a list of them for your reference: http://www.immd.gov.hk/ehtml/hkvisas.htm

does the beijing office have any website? what is the phone number to that office?? thanks

The phone number is (852) 2824 6111. I'm afraid the Beijing office doesn't have a sperate website.