At the age of 19, Niu could not find any roles in films, so he started hanging out with his so-called "corner brothers" and improved his Taiwanese tremendously.

In June 2013, he brought Chinese cinematographer Cao Yu into the Navy base in Zhuoying under a false name.

On July 16, 2013, Niu admitted his wrongdoing in the court in Kaoshiong and paid NT$200,000 for bail.

[8] On 5 December 2018, a female crew member on the set of Pao Ma filed a police report accusing Niu of sexually assaulting her the previous month.

An appeal to the Taiwan High Court was heard in April 2020, and he was sentenced to four years imprisonment.

The character in the movie is also a director attempting to gather enough money to produce a mockumentary film.

[16] Monga is a gangster movie that takes place in the Wanhua District of Taipei and has a cast of mainly young actors like Mark Chao and Ethan Juan.