what is the requirements for a tourist visa to Hong Kong. I have Chinese resident permit.

You can apply for a HK tourist visa from Chinese embassy in Ghana. Documents needed are as follows:
1. Properly and truthfully filled out Visa Application Form, to which one passport-size photo is attached.
2. Valid passport with blank pages and a photocopy of the data page.
3. Hong Kong guarantor (or company name)'s address, telephone number (if none, please fill in form with "No guarantor").
4. Copy of other country's Resident Permit (China).
5. Round trip air-ticket booking list, hotel reservation & Ghana company register certificate, tax clearance, true bank statement and employed certificate.
6. Holiday certificate from company.
If your application will be sent to HK immigration, the time needed is about 4 weeks.