Xi's China is closing to the world. And it isn't just about borders

It's been nearly two years since China shut its international borders as part of its efforts to keep Covid-19 out. China tamed the initial outbreak in Wuhan by locking down the city of more than 10 million people, confining residents to their homes for weeks and suspending public transportation.Since then, Beijing has adopted a zero-tolerance playbook to quell resurgences of the virus. Harnessing