Dongkai "Jee" Ji is a professional Counter-Strike 2 player. He began his career in February 2020. At the start of his journey, Dongkai played for several lesser-known mix teams, with whom he did not achieve significant victories. His best early result in esports was a 3rd place finish at 5EPLAY Pro League - 2020 Season 1 Week 3.
In June 2020, Ji joined NewHappy, where he won his first championship title, emerging victorious at CNCS Shooter League #3. Following this, he claimed a gold medal at 5E Open Cup: January 2021, secured silver at Huya DarkHorse League Season 8 and 5E Open Cup: March 2021, finished 1st-2nd at Perfect World League Season 1: Open Qualifier #2, and took 3rd-4th place at DreamHack Open June 2021: Asian Open Qualifier #1.
After these achievements, Dongkai went inactive and remained so until February 2023. At that point, he signed a contract with TakeMeAway Gaming, where he won a silver medal at BLAST.tv Paris Major 2023: Chinese RMR Open Qualifier. Shortly after, he was loaned to Lynn Vision Gaming, with whom he participated in two tournaments: 5E Arena Asia Cup Spring 2023 and ESL Challenger League Season 44: Asia-Pacific, securing silver and gold, respectively.
In April 2023, Ji returned to TakeMeAway Gaming, but he stayed with the team for only a month before receiving a full contract offer from Lynn Vision Gaming, which he accepted. He competed for the team from May 2023 to June 2024, significantly expanding his list of achievements.
Upon rejoining Lynn Vision Gaming, Dongkai "Jee" Ji won championship titles at XSE Pro League 2023, Intel Extreme Masters Sydney 2023: Asian Open Qualifier #1, Intel Extreme Masters Sydney 2023: Asian Qualifier, Perfect World Arena Premier League Season 5: Professional Division, Intel Extreme Masters Chengdu 2024: Chinese Qualifier, eXTREMESLAND 2023: Chinese Qualifier, PGL Major Copenhagen 2024: Chinese Qualifier, and ESL Challenger League Season 47: Asia. Additionally, he secured silver medals at ESL Challenger League Season 45: Asia-Pacific, eXTREMESLAND 2023, and PGL Major Copenhagen 2024: Asia-Pacific RMR, as well as a bronze medal at ESL Challenger League Season 46: Asia-Pacific. He also finished 1st-4th at XSE Pro League 2023: Online Stage.
In July 2024, Dongkai "Jee" Ji transferred to TYLOO, where he continues to compete to this day. With the Chinese team, he won silver medals at 5E Arena Asia Cup Fall 2024, Intel Extreme Masters Rio 2024: Asian Qualifier, and Perfect World Shanghai Major 2024: Chinese Qualifier. He also secured championship titles at XSE Pro League Season 2 and ESL Challenger League Season 48: Asia, and finished 1st-2nd in the Asian Open Qualifier for Intel Extreme Masters Dallas 2025.