Canada two weeks: https://www.canada.ca/en/employment-social-development/servi...
China, 30 days: https://china.acclime.com/guides/china-labour-law-hiring-fir...
Russia, two weeks: https://uk.practicallaw.thomsonreuters.com/5-503-4083?transi...
(Did you really think ex-communist countries would be good examples?)