If you have a 10-year round-trip tourist visa to Canada, do you have to return home or leave the country directly after half a year?

Just leave Canada, but you have to go through customs.

It should be noted that re-entering the customs in a short time may question your purpose of going to Canada, because you are a tourist visa, and it is unreasonable to come to Canada immediately after leaving the country at the expiration of half a year. Although there is no problem with the superficial procedures, the customs will judge the credibility of your short-term re-entry into Canada according to your occupation or economic strength. If they are suspicious, they will refuse you entry.

Canadian tourist visa refers to the visa issued to applicants who travel to Canada. You don't need an interview to apply for a Canadian visa, but you need to pay the correct application acceptance fee in cash to apply for a Canadian tourist visa.

1. You don't need an interview to apply for a Canadian visa. Consulates have high requirements for information. It is recommended to provide the original household registration book, marriage certificate, real estate license, motor vehicle registration certificate and passbook as much as possible.

2. If the applicant has obtained a Canadian visa in the past five years, and has visited Canada normally and left Canada legally, he/she needs to submit a certificate explaining the purpose of this application to visit Canada.

Source: Baidu Encyclopedia Canadian tourist visa