Why does Taipei discriminate against Tainan?

Cultural customs and the causes of economic development. Tainan is a relatively rural area, dominated by Hakkas, and many Hakkas have lived there for generations. Taipei is a developed city, with more immigrants and a big gap between cultural customs and economic development, so Taipei will discriminate against Tainan. Taipei belongs to an ordinary city, while Tainan belongs to the countryside in the eyes of Taipei people.