Taiwan has fully re-opened to foreign tourists after more than two years of strict COVID-19 border restrictions. Visitors to the self-ruled island are no longer required to quarantine upon entry, or to take any PCR tests. Instead, they will need to test negative on a rapid antigen test on arrival, and monitor their health for a week. Taiwan’s tourism bureau estimated that a total of 244 tourists from some 20 tour groups will arrive Thursday. The news comes as Japan and Hong Kong also relax their entry rules. But would-be visitors to nearby China still face harsh quarantine policies. So what ar…