Underground rapper Chen Yanheng made the news last year after punching singer Lin Junjie during an autograph session.
According to The Hive.Asia, Chen has threatened to attack the Singporean celebrity once again.
Wrote Chen on Facebook:
"JJ, wait for me, I will return to Taiwan to pound you."
The rapper has said that he hit JJ Lin in the face last January because of his 'flirty behaviour'.
The 33-year-old singer was meeting fans and signing autographs to promote his new album "Genesis" when Chen rushed onto stage and "took a swing" at the singer
Chen was also unhappy that the Singaporean is more attention then he is in Taiwan.
Lin has yet to respond to the threats.
See photos related to the assault on JJ Lin in the gallery below.