Later, after being introduced by his uncle, Rong started training at Enbo Fight Club as an assistant and sparring partner for Su Mudaerji, where his duties included tasks such as carrying towels and water.
[5] Having his first pro fight just days after his 16th birthday in 2016, Rong compiled a 17–3 record on the Chinese regional scene, most off it with the promotion WLF, where he captured the Lightweight title and defended it three times.
[12] Rong faced Ignacio Bahamondes at UFC Fight Night: Makhachev vs. Green on February 26, 2022.
[17] In the Semifinals, Rong faced Kim Sang-wook on August 27, 2023, at Road to UFC Season 2: Episode 6, winning the bout via unanimous decision.
Rong won the fight via a rear-naked choke submission in the third round to become the Road to UFC 2 Lightweight champion.
[22] He lost the fight by technical knockout via doctor stoppage as a result of an elbow to the eye in the second round.