Ren old eLeVeN Yanfeng is a Chinese esports athlete. He is a multiple-time finalist and winner of majors and other major competitions, regularly participating in The International.

Old eLeVeN's professional career began in 2013 with Subvert. The team managed to qualify for the Fengyun Dota 2 Tournament, but after finishing 9-16th, the team disbanded. Later, old eLeVeN joined Immortal Magneto Gaming, where he didn't achieve significant results. In 2015, old eLeVeN joined EHOME, qualifying for Nanyang Dota 2 Championships, The Summit 4, and other tournaments. The team placed 4th at The Frankfurt Major 2015, reached the top 12 at The Shanghai Major 2016, and won Dota 2 Radiant & Dire Cup 2015 and MarsTV Dota 2 League 2015 Winter. At The International 2016, the team advanced through the Wild Card and secured the sixth position. Later, old eLeVeN moved to LGD Gaming on loan.

With LGD, he won the Mars Dota 2 League 2017 and placed 4th at The International 2017. After the tournament, Ren joined Vici Gaming and won Dota 2 Professional League Season 5 (2018 S1) - Top, placed top 6 at Dota 2 Asia Championships 2018 and China Dota2 Supermajor, and top 2 at ESL One Katowice 2018, as well as 9-12th place at The International 2018.

In the following season, old eLeVeN played for Keen Gaming, securing the 2nd place at World Electronic Sports Games 2018, winning ESL One Mumbai 2019, and placing 13-16th at The International 2019. In 2020, old eLeVeN joined PSG.LGD and won China Dota2 Professional League Season 1 and 2. In September of the same year, the player joined Vici Gaming, then moved to Xtreme Gaming. In 2024, he managed to qualify for the Elite League as a member of kev.

• On June 4, 2025, old eLeVeN joined Yakult’s Brothers.

In mid-June, as part of Team Zhou, he competed in the Chinese tournament Immortal Cup S1 and emerged as champion.

On June 28, 2025, the player left the Yakult's Brothers roster.