Shanghai or Vancouver?

Vancouver is affected by the Pacific warm current, and the weather is similar to that of San Francisco in the south. In winter, there will be a burst of snow when it meets a cold current, but it will soon melt. When Shanghainese come to Vancouver, they should adapt to the climate. Vancouver has a beautiful environment and is a garden city, which is quieter than Shanghai. There are all kinds of Chinese food in China. Eating is not a problem.

But Vancouver is, after all, a society dominated by westerners. It takes a long time to get used to cultural differences (in a broad sense), and you may never get used to them. You will always feel lonely and different.

Employment is a problem. Professional skills and experience in China are not recognized in Canada (although the Canadian government is planning to improve the accreditation mechanism). The local unemployment rate is high enough that it is a problem for new immigrants to find jobs. For skilled immigrants, it is very common to work in restaurants or engage in manual labor other than their major.

Unlike the United States, Canada allows dual citizenship. I suggest that your friends can come and stay for a while, experience and compare, and go back if they don't adapt.

I think China, especially Shanghai, is developing rapidly and well now. Why do you want to leave Shanghai for Vancouver?