We are Sri Lankans visitng Canton and wish to go to Hong kong and return to Canton and to Colombo?

You need to apply for a double entry one for your visit to Canton and then another one for your HK visit. You can apply for both from the the embassy there.

For the application, you should provide your passport with the validity of six months at least and blank pages, a fully filled application form with a recent six months passport size photo, round trip air tickets and hotel reservation (or an invitation letter from a Chinese duly authorized organization or an individual).

For the HK application, your passport, application form affixed with a recent passport size photo, a copy of your passport information page and personal bank statement.

Thank You! Clair for your advise. We appreciate your response.

kind regards

Gihan