Only after asking did they find out what actually happened. Right after Justice carried Shui WuBo's body away, Yu ManLou had collapsed onto the ground unconscious. After the experts under Yu ManLou took him away to take a rest, they left without witnessing the final mixed battle.
They estimated that Yu ManLou had probably escaped to the pier at that moment, leaving on the boat immediately...
He left without the slightest bit of hesitation!
Yu ManLou's judgment was truly admirable.
He did not consider whether or not Justice had spotted anything and did not dream that Justice would die from the venom in Shui WuBo's body. He made plans for the worst possible scenario and left immediately. He could not even be bothered about what would happen to his Yu Family in Heavenly Wind...