A foreign national who wishes to 工作 in Canada generally requires a 工作 permit. 工作 permits allow people to quickly begin 工作ing in Canada 和 can be a stepping stone toward Canadian permanent resident visas.
打算去美国的外国人通常需要工作许可证。“work” in Canada. For Canadian immigration purposes, 工作 is defined as an activity for which wages are paid or commission is earned, or that competes directly with activities of Canadian citizens or permanent residents in the Canadian labor market. Any activity that does not take an opportunity from a Canadian to be employed or gain 工作 experience is not considered 工作 eg: volunteer 工作 or 工作 done by phone/internet where the person is employed by a company outside Canada.