Bu "YaphetS" Yanjun, also known as 'PIS' or 'Perfect is Shit', is a professional DotA player who is currently teamless. He was considered the best Shadow Fiend player in the world at the height of his DotA career.
The first time YaphetS came into public attention is the time his replays are continuously uploaded in sGamer.com, which received comments on being self-hyped. YaphetS himself had arguments on the forum causing him to be publicly disliked. In February 2008's CDL tournament, YaphetS and his team Sison competed and won the first match. However, in the later match, his team was caught cheating and was disqualified. YaphetS, being the team captain, suffered from public criticism. Soon after, he disappeared from the dota scene.
In May 2008, an old school Chinese team maGe reformed with YaphetS as the team leader. In an interview by sGamer.com he stated that "I want to say that our plans is to not play just within China, i think we will flourish internationally." This was regarded as overly arrogant by the community due to the team's less than ideal results. The team soon disbanded afterwards.
September 2009 in a WCG regional qualifier, Yaphets performed brilliantly, and caught attention of several teams. Less than a month later, Yaphets joins professional team cYc , and the team was able to challenge top teams such as EHOME and CH at that time. However, a wrong move by the manager sealed their fate as they disbanded. He lost to devilnam.
By the end of 2009, YaphetS joined G5. G5 did not last very long, and Yaphets still lacks the qualities of being a professional player. After his fatal mistake in the AWTV match against Russian team Rox.Kis , G5 split up and disappeared.
To continue his professional dota career Yaphets joined CH in 2010. the YouTube movie "Perfect is shit", which emphasized on his great reflexes and moves in the game, raised Yaphets' popularity to the top. However, a conflict between the team members, DGC and LongDD, has eventually caused YaphetS to side on DGC and leave CH.
YaphetS joined Nirvana.cn after leaving CH, taking over xiami and zippo. A win in the World Cyber Games China 2010 , followed by second places in several tournaments during the domination of EHOME. They stood at the top of the international dota scene, winning the World DotA Championship by beating Deity in the finals. He won a 1v1 showmatch in an precedently undecided tie between him and YamateH as the best Shadow Fiend in the world. Nirvana.cn also won the Razer Global Challenge, with many Europeans participating in the tournament.
At the start of 2011, big-spending DK invited YaphetS to join their galactico squad.  However, they underperformed throughout the first 6 months as YaphetS finally retired from professional DotA at the conclusion of the G-League season 1, where DK placed second.
During his retirement, YaphetS produced first-person videos on youku on his DotA games.
Return to Competitive Play
- NGF (2010)
- U9 (2010)
- Electronic Sports World Cup Chinese Qualifiers (2010)
- WCG China (2010)
- G-League Season 2 (2010)
- Natttnal eSports Open (2010)
- Topgamer (2010)
- World DotA Championship (2010)
- Razer Global Challenge (2010)
- SMM Grand National DotA Tournament (2010)
- World Gamemaster Tournament (2011)
- Considered one of the WC3 DotA gods, nicknamed P-God by the Chinese.
- Shadow Fiend's fun name in WC3 DotA is named after YaphetS.
- Yaphets has the nickname of "Pigeon" in China. Pigeon is a slang used to denote ditching, something that Yaphets has been known for, such as costing Team DK their opportunity to attend The International 2011, and faking an injury to leave Team Fantuan.
- His daughter was born on February 4, 2019.
- "路人出道 锋芒乍现".
- "DotA - Legend of YaphetS：The BEST Shadow Fiend Player".
- "Pis与草莓加盟cYc 国内纷争正式打响".
- "【战队】CYC分崩离析 职业DOTA战队冬日难熬".
- "RoX.KIS upsets Chinese 3:2".
- "Another G5 star falls".
- "CH adds three after major reshuffle".
- "Video: Perfect Is Shit".
- "PIS: I'm Leaving CH & The Unfolded Drama".
- "PIS & DGC to Nirvana.cn".
- "WDC: Nirvana.cn crowned champions - DTS takes third".
- "华海dota明星挑战赛 与世界大神PIS的巅峰对决".
- "RGC: Final Standing".
- "China's DotA Shakes Again, Pis Leaves Nv.cn and Joins DK".
- "[转会Pis惊爆转投DK 大地震还未终结"].
- "G联赛DOTA决赛DK错失冠军奖杯 LGD捧走15万".
- "Pis' debut video is finally out".