Taiwan President Tsai Ing-wen appointed a new Prime Minister on Friday following the resignation of the incumbent over the recent electoral setback suffered by the ruling Democratic Progressive Party.
Lai announced his resignation on Thursday night and made it effective on Friday morning after a cabinet meeting.
His exit had been expected since Premiers in Taiwan usually step down after a party's election defeat.
Experts believe Su could help garner support for Tsai within the party and boost her chances of re-election in 2020.
The DPP suffered a resounding defeat in the local elections of November 24, which sparked opposition to Tsai's 2020 candidacy among pro-independence supporters.
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