That's bullshit. Nobody can lose that much weight and get that ripped in a month.
He didnt gain those muscles in 28 days, he just lost fat so you can see them.
Ripped or not has almost nothing to do with muscles, its mainly about your body fat percentage
It says vegan body-building not vegan weight-loss challenge, and I also said lose weight, but you can't just lose weight and you suddenly become 'ripped', but yes you need to lose the body fat as well.