He also co-wrote and starred as Lu Ho-jo in the autobiographical drama Roseki 1914 (2018), winning Best Writing and receiving a nomination for Best Male Lead in the 53rd Golden Bell Awards.

Following the critical recognition, Mo also starred in Goddamned Asura (2021) and The Embers (2024), for which he received another nomination for Best Supporting Actor in the 61st Golden Horse Awards with the latter.

[8][9] However, he was invited to join the school's drama club in the second semester, which ignited his passion for acting, and he cited the "sense of freedom" he felt on stage as a key reason for his newfound interest.

[14] During his university years, he developed an appreciation for literature,[8][15] and worked part-time at Eslite Bookstore on Dunhua South Road in Taipei, often reading books there even when he was off duty.

[16][17] Due to his dislike of commercial activities and dealing with the press, Mo chose to work as a stage actor after graduation,[18][19] and he continued to be labeled by the media as leading a "low-profile life".

[14] He described his on-screen career as "unproductive", as he typically took on only one role at a time and often requested extensions of several months for pre-production to prepare for his characters, which led him to reject many offers.

[31] He also took on a leading role as Jack, a journalist searching for a missing singer played by Tong Yao, in the Chinese-Hong Kong-Taiwanese-Japanese co-production Snowfall in Taipei.

[41] In 2014, Mo made a cameo appearance alongside Blue Lan in Apple in Your Eye, a TTV series and the latest project of An Innocent Mistake's writer Mag Hsu [zh], as lead actress Amber An's colleague.

[49][50] In the same year, he was approached by Cheng Yu-chieh at a wedding and offered the chance to collaborate on a project that he and Yang Ya-che were developing, which Mo accepted before the screenplay was finished.

[59] Allan Hunter of Screen Daily collectively praised the leads as "a strong ensemble",[60] while Lu Hao-ping of Global Views Monthly particularly commended Mo's portrayal of the journalist, highlighting his "exquisite performance" and acknowledging that he adequately captured the character's complexity.

[63] In 2024, Mo received a co-leading role alongside Chang Chen in Chung Mong-hong's The Embers,[64] which earned him a nomination for Best Supporting Actor in the 61st Golden Horse Awards.

[65] Estella Huang of Mirror Media lamented the film's narrative thinness but called Mo's performance "competent within a limited scope".