Visit / Business visa on Bangladeshi passport

Mahmud, you should apply through the PRC embassy in Bangladesh. It's not hard to apply for a tourist type or a business type. However, if the embassy transfers your application to HK for approval, you may need to wait for four to six weeks for the entry permit to come out. The application documents include your passport copy, a photocopy of your financial standing documents, a copy of round-trip tickets and hotel reservations, and an invitation letter from your clients in HK.