[watchfirst9]

Should learn from Singapore to exit and resume normal life instead of repeated lockdowns.

https://www.youtube.com/watch?v=xeI7Kl1sRNU

Is their choices, and it seems both SH and SZ already back to norm.
SZ is much shorter as cases are fewer and a smaller city. 

Current vaccines induce negligible antibodies level at the entry, no way to prevent transmission.
If to be infected, some recover in days, some recovery take months, some take year more, some never, some do not make it.
Until vaccine that produce more nasal protection, relax of open travel will have long term medical cost.

Cn mobilize fast massive testing ten fold faster than rest of the world. 
Thus they willing to lockdown.