How can I get a Hong kong visa from Bangladesh?

If you are not one of the below persons, you can apply Hong Kong through China embassy in Bangladesh:
A. Government officials holding ordinary passport
B. Celebrities in Bangladeshi society and business circles
C. Employees of famous large-scale enterprise in Bangladesh, including multinational companies, international airlines and shipping enterprises, financial entities, banks, insurance entities and foreign representative in Bangladesh. Moreover, they are required to show the Certificate Letter (go to Hong Kong for Business) issued by their company.

You have to send your application directly to Immigration Department of Hong Kong Government
Address: Floor 6, Immigration Tower, No.7 Gloucester Road, Wan Chai, Hong Kong

Dear Ms.Nancymoon,

Would you pleas tell me what docs I have to submit to China Embassy to get HK visa if it is my 1st visit to HK. I shall get invitation letter from our HK office. What other docs requirements?
Thanks
Mojibur

Do you plan to work in Hong Kong or it's just a business visit?