On October 12, 2018, Liu lost to Mikita Shostak by unanimous decision at Glory of Heroes 35: Meishan.
[1] On August 9, 2023, it was announced that Liu Ce would be one of eight participants in the 30th Anniversary K-1 Openweight Grand Prix, which took place at K-1 World GP 2023: ReBOOT～K-1 ReBIRTH～ on September 10, 2023.
[5] Ce faced Glory veteran Ariel Machado in the semifinals and once again won by stoppage, forcing his opponent to stay on the canvas with low kicks in the second round.
[10] Liu faced Sebastian Lutaniuc for the vacant ISKA K-1 Intercontinental Super-cruiserweight (-95 kg) title at Wu Lin Feng 2024: 12th Global Kung Fu Festival on January 27, 2024.
[13] Ce made his first K-1 Cruiserweight (-90kg) title defense against Mahmoud Sattari at K-1 World MAX 2024 on September 29, 2024.