Inside the sack, Zhang Wuji was also tumbling down repeatedly. With the 'chi' filling his chest, he felt his torso was about to burst. He wanted to release the real 'chi' out of his body, but by this time the sack was simply too full; just to let out a breath was getting more and more difficult.
Yuan Zhen successively punched three times and kicked twice, but all his attacks bounced on the cloth sack full of real 'chi'. Inside the sack, Zhang Wuji had already fainted. Fortunately all of Yuan Zhen's attacks landed on the sack; if his hands and feet had made direct contact with Zhang Wuji's body, with the overflowing real 'chi' in his body, Yuan Zhen would definitely suffer serious injury.
Yang Xiao, Wei Yixiao and the others watched this strange occurrence in amazement, but they were also surprised that they were at a loss of what to do. This 'universe air sack' belonged to Shuo Bude, but even he did not understand why the sack was inflated like a ball. They did not even know whether Zhang Wuji was still alive inside the sack.
They saw Yuan Zhen pull a dagger from his waist and ferociously stab it onto the sack. But where the point of the dagger met the sack, the dagger simply sank into the sack and bounced back out without creating any damage. The sack was made of some strange material; it was neither silk nor leather, but of some kind of unusual and extremely rare material under the heavens. Also Yuan Zhen's dagger was not a treasured blade; although he stabbed several times, how could the blade overcome the sack?
Seeing his palms, feet and dagger were all ineffective, Yuan Zhen thought, "Why would I waste my time with this kid?" His leg flew up and he kicked with all his might. The large sack rolled straight toward the door of the hall.
By this time the cloth sack was fully inflated into a big ball. As soon as it hit the door, it bounced back with great speed toward Yuan Zhen. Realizing the sack was coming at him with a violent force, Yuan Zhen raised up his palms in front of his chest and pushed forward at the big ball with all his strength.
'Ka-boom!' The noise was like a thunder in a cloudless day, followed by shreds of cloth fluttered in the air as the 'qiankun yi qi dai', fully inflated with Zhang Wuji's Jiu Yang Zhen Qi, exploded into pieces.
Yuan Zhen, Yang Xiao, Wei Yixiao, Shuo Bude and the others felt an exceedingly burning hot air burst onto their bodies; next they saw a young man in tattered clothes standing in the middle of the hall, with a bewildered look on his face.
In that short time, Zhang Wuji had achieved the full potential of the Jiu Yang Shen Gong; water and fire flowed together, the dragon and the tiger converged. Because the sack was filled with abundant real 'chi', it was as if dozens of masters put forth their strengths and simultaneously massaged the several hundred acupoints on his body. The real 'chi' inside and outside of his body surged together to break the dozens of obstacles all over his blood passages. He felt an incomparable comfort as if a stream of mercury flowed along all his entire network of blood vessels. No one had ever met this kind of destiny, and now that the treasured sack was destroyed, no one would ever encounter such opportunity again.
Yuan Zhen saw that the young man from the sack was standing with a blank expression on his face as if he had lost his mind. Although he was severely wounded, if he did not seize this fleeting moment immediately, and if the enemy preceded him in taking the initiative, his life would be in danger indeed. Thereupon he rushed one step forward with an extended right-hand index finger, sending his 'huan yin zhi' internal strength straight toward the 'shan zhong' acupoint on Zhang Wuji's chest.
ZhangWuji swept his palm to parry. He had just completed his 'shen gong' [divine strength/power] cultivation, however, his martial art skill was still mediocre; he had not mastered the martial art skills previously taught by Xie Xun and his own father, how could he fight such an accomplished martial art master like Yuan Zhen? In just one move, the 'yang chi' ['yang' reservoir] acupoint on his wrist was sealed by Yuan Zhen. Immediately a numbing cold burst into his body; he shivered and was pushed a step backward. But his body was still overflowing with real 'chi', which in a flash was also transferred to Yuan Zhen' body via his finger.
Two different types of energy collided; one yin the other yang, exact opposite to each other, but Zhang Wuji's internal energy came from Jiu Yang Shen Gong, the strength of his power far outweighed Yuan Zhen's. Yuan Zhen's finger heated up; he felt as if his internal energy dispersed all over his body. Moreover, he had already suffered a heavy injury, the level of his power was only one-tenth his normal strength. Realizing the situation was disadvantageous for him, he thought saving his own life was more important; thereupon he turned around and ran away.
"Cheng Kun, you big evil thief!" Zhang Wuji angrily cursed, "Leave your life behind!" Moving his feet, he ran after him out of the door.
He saw a flash of Yuan Zhen's shadow as he entered another door. With anger filling his breast, Zhang Wuji rushed forward to pursue. But as soon as he exerted his strength, 'Bang!' his forehead heavily hit the doorframe.
What happened was: he did not know that after he had reached the full potential of his 'shen gong', a lifting of his hand, a kick of his foot, would be ten times more powerful than his usual strength. With just one big stride, he lost control and bumped his head on the doorframe.
Rubbing his slightly sore forehead, he mused, "Confound this demonic door; how come just one step took me this far?"
Busily he leaned sideways to enter the door, and saw that it was a small room. In his zeal to avenge his Yifu, he ran across the room toward the door on the other end. Outside the room was a courtyard, the air was filled with the fragrance of flowers and plants in the middle of the courtyard. He saw light coming out from a window of the room on the western side of the courtyard. He leaped toward the room and pushed the door open. He saw a flash of grey shadow; Yuan Zhen was pulling a curtain open and ran in. Zhang Wuji followed after him; but as he pulled open the curtain, Yuan Zhen was nowhere to be seen.
Zhang Wuji focused his eyes to look around and could not help but was inwardly surprised. This room looked like a chamber belonging to a young lady of a greatly rich family. There was a dressing table
standing next to the window, with a large red candle burning brightly on top of it, casting its light on a beautifully embroidered tapestry in the middle of the room, it looked imposingly rich and beautiful, not at all inferior to Zhu Jiuzhen's room.
On the other side was the bed, with a gauze mosquito net drooping over it. There was a pair of pink embroidered shoes in front of the bed; obviously there was a woman sleeping on the bed. The only door to this room that he could see was the one he entered in; the windows were tightly closed. He had clearly seen Yuan Zhen enter the room, how could he disappear without any trace in just a blink of an eye? Could it be that he mastered some kind of art of invisibility? Or perhaps despite his status as a 'chu jia ren' [lit. those who leave home] he was hiding inside a woman's bed?
Zhang Wuji was contemplating whether he should open the bed's curtain to search for the enemy when suddenly he heard intermittent sound of footsteps; somebody was coming. Quickly he dodged behind a piece of blanket draped by the western wall, right before two people walked in.