The cessation of diplomatic relations between the two countries in 1992 resulted in each countries' respective airlines withdrawing from all routes that connect the two. Other airlines such as CX
still flew between the two countries throughout the 90s.
Then, in 2002, dialogue between the two opened up again and CI
were granted the right to resume flights to Korea, strictly on a charter basis at first. Korean carriers were granted the same rights vice-versa. This paved the way for the resumption of scheduled flights circa 2005-6, and today we even have flights going to Taipei's domestic Songshan airport.
to this date still maintain daily flights on the TPE
route despite the re-entry of Taiwanese and Korean-based carriers in the market.
The biggest mistake made by most human beings: Listening to only half, understanding just a quarter and telling double.