I was going to post that too, don't know what parallel universe that CNN article was reporting from.
In fact, the DPP administration here in Taiwan is vehemently against any voice to implement mass testing, citing ludicrous reasons like "too much testing is bad, there will be too many false positives", etc. If you blocked out the subjects of sentences, you would think it was something out of the Trump administration.
There is reason to strongly suspect that they're just artificially keeping the local confirmed case numbers as "zero" just for sake of political face. But the fact is that Taiwan keeps exporting COVID-19 cases to nearby places like Japan, HK, Philipines, etc., suggesting the true situation here is not as rosy as the DPP tries to advertise.