Can I apply HongKong Visa at China Embessy along with China Visa application.

1. Yes, you can apply the two visas at the same time through the embassy or consulate general in your residing place.
2.Supposing that you apply in Bangladesh, you need to prepare the following documents for Chinese Business Visa:
(1)Your original passport with at least three blank visa pages, and a validity of 3 months;copy of the first three pages;
(2) Visa application form;
(3) One recent photo;
(4)Original Invitation Letter issued by authorized departments of Chinese Government
For HK visa, except the above (1) and (3),you still need to submit the following documents:
(1)Application for Entry for Visit/Transit in Hong Kong (ID 1003A);
(2)Photocopy of proof of your financial standing, e.g. bank statements, savings accounts passbooks, tax receipts, etc. and proof of employment (if any), e.g. company leave letter, salary slips, etc.
(3)Photocopy of proof of transportation arrangement, e.g. flight itinerary
(4)Photocopy of proof of the proposed leisure visit to Hong Kong