I am a Nigerian presently schooling in china. What are the requirements to visit Hongkong for a week

If you go to HK for tourism purpose, you should apply for a visit entry permit. You need to prepare those documents containing your passport and its photocopy, the application form affixed with a passport-style color photo, your financial support proof, travel plan to HK and transportation arrangement such as flight itinerary, as well as your residence permit in mainland PRC. And then submit your application to the Beijing Office of the government of HK SAR to apply.