A burly man rushed over, his fists like mountains and hammers, smashing down onto Lin Chen's back with fury! The force of a single punch caused the air to collapse and resonate.,Seeing Lin Chen frantically scratching at the surface of the training ground, his cultivation realm was growing even stronger!,I've heard of breakthroughs through sudden enlightenment, absorbing heaven and earth treasures, or even self-harm cultivation. But I've never seen anyone break through their cultivation level just by wildly scratching at the air!。