He holds notable victories over Lerdsila Chumpairtour, Rungravee Sasiprapa, Sergio Wielzen, and Chan Hyung Lee.
Deng has fought under the Wu Lin Feng, Glory of Heroes, and Krush banner.
[1] November 14, 2012 in Las Vegas, Nevada WCK Muay Thai "Wulinfeng Spectacular", Deng Zeqi defeated Lerdsila Chumpairtour to win the Lightweight WCK Muaythai World Championship -60 kg belt via split decision.
[citation needed] December 5, 2015 in Zhengzhou, Henan WLF World Championship 2015 -63 kg Tournament, Finals, Deng Zeqi challenged Wei Rui for the WLF World Championship 2015 –63 kg belt after defeating Rungravee Sasiprapa by knockout in the semi-finals of the competition.
[2] July 7, 2018 in Guangdong, China Glory of Heroes 32: Huizhou - GOH 63 kg Championship Tournament, Finals, Deng Zeqi challenged Wei Rui in a rematch, this time for GOH 63 kg Championship belt but had once again lost by knockout.