Born in Keelung, Taiwan, Shieh attended Banqiao Senior High School and studied German language at Soochow University.

Subsequently, the Judicial Yuan's Committee for the Discipline of Civil Servants determined that there was no violation, and that the use of funds for "UN for Taiwan" advertisements was appropriate for Shieh's office.

Earlier in the year, the European Affairs Committee in the parliament had previously passed a resolution to support Taiwan's bid for participation in the World Health Organization as an observer.

"[8] In Stark-Watzinger's presence, Shieh, representing Taiwan, signed a scientific and technological cooperation agreement with his German counterpart Jörg Polster, as the two countries arrange partnerships in AI, semiconductors, lithium batteries, and green energy development.

[11] In response to China's 2021 blacklist of sanctioned Taiwanese politicians labeled "Taiwan independence stubborn individuals" (台獨頑固份子) that included Foreign Minister Joseph Wu, Premier Su Tseng-chang, President of the Legislative Yuan You Si-kun, Shieh lamented that he was left off of the list.