What types of visa issued for Bangladeshis

The type of entry permit you can get is related to your visit purpose. For example, if you visit as a tourist, you can get the L type. If you visit for business issues, you can get an M type.

I intend to visit for business purpose (To find the business scope).
Now would you please tell me the application process, require papers & any others if needed.

You should apply for business M type. First, prepare the required materials including the passport and its photocopy, the application form with a passport-styled color photo glued, an original of the invitation letter issued by duly authorized unit in PRC, the original and copy of the business license of your company, bank savings account, as well as round trip air tickets. Afterwards, submit the above-mentioned materials to the embassy of PRC and wait for the result.