Not exactly... He had a 1:13 before getting WR, and before that a 1:22.. Everyone is somewhat skeptical, though.
No. He absolutely did not come from nowhere. He has a history of absolutely legitimate runs spanning from 1:10-1:57 (a perfectly normal time to start submitting runs, especially when you're from somewhere that doesn't care much about speedrun.com)
If you take a look at his bilibili page (https://space.bilibili.com/255277565), he has around 30 runs that were sub 1:20 before he got his 1:10, he has obviously been playing for a while. Skepticism around a world record run is totally justified, however the mods wouldn't blindly accept a record run without doing their research. He has streamed before, showcasing he can play to that degree of skill, he's also made a video with a handcam. That said, it isn't irrefutable evidence that he isn't cheating - but proving innocence is a mountain of a task.
Aurora and Rhetor are right! This guy is a legitimate runner who just happened to beat the record by a long shot.
This is a follow up to the previous news post, see
It has now been decided by the mod team that mobile runs should not be allowed on the individual level leaderboard due to their inaccuracy in timing. All mobile runs will be removed and no more will be ac
