Three top warriors joined forces to surround and kill the Demon Emperor, yet they fought until exhaustion without killing him, a feat that's truly embarrassing.
But it was actually to be expected: Smiling's transformative Divine Abilities could be conjured and dispelled at will. If he attempted to attack, he might have flaws, but when he focuses solely on defense, who could easily breach his defenses?
Smiling's nine-layer protective Gang Qi was not a spur-of-the-moment Combat Skill, but the result of years of practice, initially forming one layer, then two, then three... until now he could conjure nine layers instinctively.
If Smiling had decades more, he could upgrade the nine layers to eighteen layers of hell, and by then Cha Huan and the others might not even be able to breach his defense.
