|This player has retired from competitive StarCraft II.|
|This article is a player stub. You can help Liquipedia by expanding it.|
|Romanized Name:||Yifeng Sun|
|Birth:||February 17, 1983|
|Alternate IDs:||Dream.F91, FaiFai, F91, ZeroUntil|
|PhoenixTeam, Dream, Nirvana, Duskbin, Fnatic, MYM, SvS|
Sun "F91" Yi Feng is a Zerg player from China, who is currently teamless. He went 'amateur status' to focus on family affairs.
As a veteran player, F91 has had numerous achievements in Brood War, especially in Chinese tournaments. For a long time, he was considered the top Zerg in China, and was nicknamed the 江南狗王, or Zergling King of the South. In 2009, he was invited to play in Teamliquid's Liquibition tournaments, where he achieved 5 straight victories, and remained undefeated until the end of Liquibition, garnering him much attention in the Teamliquid community.
Despite being a Chinese player, F91 was specially invited to play in TSL2, which he would have to fly out to Taiwan for to play in the tournament. Due to time constraints, F91 needed to place in the top 12 of the open iCCup ladder to be seeded directly into the second round. Near the end of the laddering stage, F91 was unable to finish in the top 12, and resorted to abusing, and was subsequently disqualified and banned from Teamliquid events for a year. Additionally, he was banned from competing in TSL3.
 In Beta
F91 was considered a good SC2 player in China, but not to the same extent as his Brood War dominance. His best finish was the Ro8 of the 17173 World Cup, where he lost 1-3 to Maka after defeating White-Ra 2-1.
 Wings of Liberty
On the 20th of June 2011 it was announced that F91 would be joining team Nirvana as the captain to help rebuild their StarCraft II division.
Recently got 2nd place in WCG China 2011 after losing 1-2 to XiGua and has secured his spot to compete in the Grand Finals in Busan.
At WCG 2011 Grand Finals he went 4-2 in a close group which consisted of players such as Socke, Sen, elfi and mOOnGLaDe. He was tied with Socke but advanced because he beat him earlier. He managed to eliminate DarKFoRcE before being defeated by fellow Chinese Zerg XiGua.
He has qualified for NEO Star League Season 1 Round of 16.
Was a finalist in the 2012 World Championship Series China.
 IGN ProLeague
 IPL Season 5
From May 27 to June 10, 2012, F91 participated in the IPL 5 Chinese Regional Qualifiers. To start off the tournament, F91 was placed in Group B. After advancing through his group with a score of 2-1, F91 advanced in to the elimination bracket. In the elimination bracket, F91 went on to take down Comm and Jim and advanced in to the finals to face XiGua. He wasn't able to advance any further and had to settle for second place after he lost to XiGua by a score of 1-4.
- Chose the ID "F91" for being a big fan of the anime series Mobile Suit Gundam F91.
- Sen used his South Korean account to make his infamous sentry video.
- Known as the comedian-in-chief(谐会会长) in Chinese scene because of his unorthodox play and amusing blunders in his FPVODs.
- F91's comedian play style was named "Athena Exclamation" (Five hatchy opening), "The Anger of Zeus"(Six Hatchy Opening), "Ragnarok"(Seven Hatchy Opening).
|2012-06-10||IPL 5 Chinese Regional||F91 1 : 4 XiGua||$300|
|2012-04-15||NEO Star League 2012 Season 1||F91 2 : 3 TooDming||$793|
|2011-08-07||WCG 2011 Chinese Qualifier||F91 1 : 2 XiGua||N/A|
|2011-07-10||NetEase StarLeague||F91 3 : 0 LoveCD||N/A|
|2011-06-24||ESL China Go4SC2 Pro June 2011||F91 1 : 2 MacSed||N/A|
|2011-05-13||WCG 2011 Shanghai Qualifiers||F91 1 : 0 Loner||N/A|
 WoL Matches
 Beta Matches
- ↑ http://www.teamliquid.net/forum/viewmessage.php?topic_id=107618
- ↑ http://sc2.cn/xingji2.php?action-viewnews-itemid-20680
- ↑ http://t.qq.com/p/t/52622103153566
- ↑ http://www.youtube.com/watch?v=swdspAisUPg
- ↑ "网易专访：本色谐星F91的职业历程与幸福生活" (in Chinese). 163.com. 2013-02-02. Retrieved 2013-08-14.
- ↑ "谐星语录雅典娜的惊叹" (in Chinese). youku.com. 2013-09-11. Retrieved 2013-09-12.