Congolese (Dr Congo)passport holder coming from Hong Kong,Do I have chances to get the visa?

Yes, as a Congolese citizen you have a chance to be granted a visa on arrival because DR Congo does not belong to ineligible countries. However, I have to say that the citizens of DR Congo rarely apply for this visa, so their success record is not known. It is also true that DR Congo citizens have to pay for a visa an amount of 816 CNY due to reciprocity. This is relatively high amount and only you can decide is it worth it or not :)