That night, under the bright moon, Lu Yu, as usual, sat in meditation practicing Qi Cultivation. The essence of the sun and moon beckoned the lung's Metal Qi, which when Metal Generates Water flowed into the kidneys, passed through the liver and transformed into Wood Qi, and in turn summoned Heart Fire to spur the spleen into producing Earth Energy. The Five Elements circulated endlessly in creation.
At that moment, he sensed something and walked to the door, where he found a monkey's Soul, prostrate in the courtyard. He observed it carefully and felt an air of familiarity. Upon closer inspection, he realized it was the Red-Buttocked Horse Monkey, a monkey under Sun Wukong's command—the monkey that had been appointed as Marshal Ma.