Chia-Chen "ZJZ" Tseng is a Taiwanese fighting games player. ZJZ is a two-time EVO champion, having won The King of Fighters XIV at EVO Japan 2018 and The King of Fighters XV at EVO 2022.  He also ranked 1st place out of 542 entrants in the EVO Japan 2018 tournament. Also ZJZ competed and finished 2nd in BeePro Cup 2022 and The KOF Challenge IV, 3rd in Loubeibei Cup Invitational 2022 and GTW Gangtouwa 2022 Autumn - KoFXV.

As a Street Fighter V player he is well known for participating in the Taipei Major 2019 Tournament where he ranked 17th place out of 389 entrants.

ZJZ also competes in Granblue Fantasy Versus and Samurai Shodown.

You can follow ZJZ on Twitter and Twitch.