how can i make an appointment for a chinese visa?

Hi, appointment is not required, you can visit the consular office directly on their working days. Basic requirements are your passport valid for more than 6 months, application form, photo, return ticket and hotel reservation. If visit for business, an invitation letter is required.
The telephone numbers of Consular Office are (242) 393-2263/467-2969 (Cell) while the telephone number of the Embassy is (242) 393-1415.