[4] In 2015, Bai made his acting debut in the PTS period drama The Best of Youth [zh], portraying the younger version of Austin Lin's character when he was five years old.

Lifestyle review for the first two episodes that Bai's performance maintained the standards he set in Dear Tenant,[21] and he won Best Supporting Actor in a Miniseries or Television Film in the 57th Golden Bell Awards for his role.

[22] He also appeared in the HBO Asia fantasy series Twisted Strings [zh] as part of the ensemble cast, playing a young boy who befriends Tony Yang's character while hospitalized.

[23] In 2021, Bai announced a hiatus from acting to focus on junior high school, concluding with his role as Keat, the son of a fisherman (played by Lee Lee-zen) who fantasizes about mythical creatures, in the 2022 fantasy film Hello!

[24][25] Han Cheung of Taipei Times commended Bai for his "nuanced portrayal of an introspective yet strong-willed child" and acknowledged his rapid improvement since Dear Tenant.

[24] Bai's hiatus lasted about two years,[4] before he returned in late 2022,[26][27] landing the male lead role Liao Je in Hsiao Ya-chuan's drama film Old Fox,[28] where he cited the screenplay as "irresistible".