It had been assumed that Ye Xiaofei couldn't defeat Little Red Flower, but this move likely threw Little Red Flower's back out.
Humans have only recently developed the spine, which also happens to be their weakest link, you see if a person's spine breaks, it can lead to a mild case of fainting or paralysis or even cause death in severe cases, but the spine is also very tough, stronger than a little brother's soft bones at least.
Little Red Flower stood up with a chuckle, but suddenly he felt an intense pain in his spine, which he initially thought resulted from hitting it on the furniture, causing the pain.
However, he then realized that wasn't the case, it was actually Ye Xiaofei's attack that had penetrated his body and struck his spine, a very mystical move known as the Style of Hitting Cow Through the Mountain.
Little Red Flower, having stood up, collapsed back to the ground, feeling utterly weak as he said, "What's going on?"