The timeline is interesting. The lockdown started on Jan 23. At this point they had a few thousand cases and 50 or so deaths, less than many countries have now.

The timeline is interesting. The lockdown started on Jan 23. At this point they had a few thousand cases and 50 or so deaths, less than many countries have now. The announcement of transmission without symptoms came out on Jan 26. Around this time China also extended restrictions over the whole country. Many countries including the US started announcing travel restrictions on travelers from China in the next few days, to take effect around Feb 1. The WHO and China called it an overreaction.