My chinese wife and daughter want to visit her sister and cousin in Canada. My wife is a US Greencard holder, and her daughter is a US Citizen. Is my wife required to get a Canadian Vistitor Visa to enter/exit with her US Greencard and Chinese Passport? My daughter is a US Citizen, so I guess her US passport is all that is required ....don't need Canadian Visa? I have been reading the Canadian Embassy website and various forums on people giving advice, it's confusion. Also,her sister is on a "6 months visitor visa" from China staying with her daughter in Canada.She received her visa by requesting that she visit her daughter for college graduation, can she stay in Canada and ask for another 6 months extension on her visa, or does she have to go back to China and re-apply there to go back to Canada on another trip. What are the odds that she will be refused to enter Canada again to be with her daughter? Thankyou, Chris