I have lived in 4 countries on three different continents and I have traveled all over the world. Taiwan's metro system is the indisputable best in the world. Hands down. It is better than its closest rivals (those in Hong Kong, Singapore, and Seoul) and WAY better than any other metro system in the rest of the world.
I don't think it is better than in Singapore, even in China. Here is the mainland China’s metro ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-aJz4OZ-nC10.html