apply hong kong 7 days visit visa

Khalid, you need to provide a completed application form affixed with a passport-style photo, copy of your passport, proof of financial support, flight itinerary, accommodation arrangement, and travel plan. Next, post your application to HK immigration department to apply for it. Below is the postal address:
Receipt and Despatch Sub-unit
HK Immigration Department
2/F, Immigration Tower
7 Gloucester Road
Wan Chai, HK

Thanks for your useful reply. But because recently I am living in guangzhou. If I want to go to Hong Kong by train or by bus . Also I need to provide train or bus ticket?

If you have residence permit in Guangzhou, maybe you don’t need to provide train or bus tickets. You can just provide a copy of your residence permit.