Hi We are planning to visit Hong Kong 2014 iand taking a cruise with Itinery to Beljing and Shanghai

We are flying to Hong Kong with round trip ticket from Toronto, and we intend to take a cruise embark Hong kong and with itineries to Beljing and end up in Shanghai and we shall get a one way ticket from Shanghai to Hong Kong after the cruise (within 12=24 hours, do I need any visa