[ChemSpider]

Pure politics. You can buy tickets for Taiwan's trains only in Taiwan, or online of course.

Plus, they missed to include Taiwan's high speed railway system. I am sure that was on purpose, too, since it was build before the Chinese one (2007).

https://en.wikipedia.org/wiki/Taiwan_High_Speed_Rail

[ginko]

They're also missing the Alishan Forest Railway.

also isn't the red line the Taiwanese HSR?

[ChemSpider]

Yes. But it is missing in the GIF. Because there it would have to be the first line to show up.