China Visa Requirement for Bangladeshi Official Passport Holder.

Dear Concerned, Please be informed that I am holding Bangladeshi Official Passport. Planning to visit China see my daughter Studying in Southern Medical University at Guangzhou, China. Do I need to take entry permit from Bangladesh before proceeding to China or China Visa exemption for Bangladeshi official passport holder. Kindly Check and advise if ok to Visit China with Official Passport without taking prior Visa from Home Country. Appreciate your kind assistance. Thanks & Brgds, Hasina Begum