Leave your partner and children behind. Quarantine for up to a month. Get inoculated with a Covid-19 vaccine from China, if you can find one. And prepare yourself for an anal swab. For the past year, people trying to go to China have run into some of the world’s most formidable barriers to entry. To stop the coronavirus, China bans tourists and short-term business travelers outright, and it sets tough standards for all other foreigners, even those who have lived there for years. The restrictions have hampered the operations of many companies, separated families and upended the lives of thousands of international students. Global companies say their ranks of foreign workers in the country have dwindled sharply. At a time of strained tensions with the United States and other countries , China is keeping itself safe from the pandemic . At the same time, it risks further isolating its […]