If you are traveling to Hong Kong with Canadian passport in most cases you do not need to obtain entry visa to Hong Kong at the consulate beforehand. The period of stay though may be limited by the laws of Hong Kong. You may check what is the allowed period of stay at the Hong Kong consulate in Canada. All other applicants should check information on Hong Kong visa requirements, procedure, application forms, fees and processing timings may be found here: http://hong-kong.visacenter.ca.