Democratic Progressive Party legislator Lin Ching-yi won the by-election for Taichung 2 to replace Chen Po-wei, who was recalled on 23 October 2021.

[4] He narrowly defeated the incumbent Kuomintang legislator Yen Kuan-heng by 2.30 percentage points.

[10] The CEC originally planned for a recall vote on 28 August 2021, but postponed it to 23 October 2021 due to the COVID-19 pandemic.

[19][20] A number of people set up or used cameras near polling stations, in contravention of election law.

[22] Political scientist Shen Yu-chung attributed Lin's win to the Democratic Progressive Party's past successes in the 2020 presidential and legislative elections, stating that most voters cast ballots based on party affiliation instead of local issues.