Hi i will be travelling to china GUANGZHOU then travel to MACAU how the visa process for BANGLADESH

If you go the two places for tourism purpose, you need to apply for two separate tourist entry permits to the two places respectively.
For Guangzhou, you need to book a tour from a travel agency and then apply for a group tourist L type to go there. You need to provide those documents: a notification letter from an authorized unit in PRC, the application form, your passport and its copy, an introduction letter from the travel agency.
For Macau, you need to provide copy of your passport, the filled-out application form affixed with a half-length color photo, financial support proof, hotel booking record, flight itinerary and your travel plan.
And then submit the applications to the embassy of PRC to apply.