https://www.sciencemag.org/news/2020/03/china-s-aggressive-measures-have-slowed-coronavirus-they-may-not-work-other-countries

the report is unequivocal. “China’s bold approach to contain the rapid spread of this new respiratory pathogen has changed the course of a rapidly escalating and deadly epidemic,” it says. “This decline in COVID-19 cases across China is real.”
"The question now is whether the world can take lessons from China’s apparent success—and whether the massive lockdowns and electronic surveillance measures imposed by an authoritarian government would work in other countries. “When you spend 20, 30 years in this business it’s like, ‘Seriously, you’re going to try and change that with those tactics?’” says Bruce Aylward, a Canadian WHO epidemiologist who led the international team and briefed journalists about its findings in Beijing and Geneva last week. “Hundreds of thousands of people in China did not get COVID-19 because of this aggressive response.”

I rest my case.