Life had suddenly become rather busy for Zhang Wuji, but he had also learnt quite a few new techniques and prescriptions from Hu Qingniu. The experience had proven to be beneficial so far.
One morning, Zhang Wuji discovered a slight darkening of the skin on Ji Xiaofu's brow, as if her internal injuries had recurred. He quickly took her pulse and asked her to provide some saliva for a test, eventually confirming that the poison in her body had returned. Zhang Wuji could not figure out what had happened, so he went to ask Hu Qingniu for help. The physician sighed and told him what to do. Sure enough, the treatment worked immediately. Then, Jian Jie's scalp began to rot and give out a terribly foul smell. The fifteen patients had regained eight- or nine-tenths of their health in the past few days, yet in a single night, everyone had taken a turn for the worse.
Zhang Wuji did not understand how this happened, so he turned to Hu Qingniu for an opinion.
"All of them have suffered extraordinary injuries," said the physician. "If they could be easily healed, why would they need to come to Butterfly Valley and beg me for help?"
That night, the boy lay in bed and thought: It is common for injuries to recur, but it is way too strange for such a thing to happen to all fifteen people at the same time. Furthermore, their conditions seem to change again and again. The matter kept him awake until the third watch of the night (11.00 p.m. to 1.00 a.m.) had passed.
Suddenly, he heard the soft crushing of fallen leaves as someone walked quietly past his window. His curiosity aroused, Zhang Wuji made a hole in the paper covering of his window and peered outside. He saw a figure flash by, before disappearing behind a Chinese scholartree (huai2 shu4). It looked like Hu Qingniu.
Why is Mr Hu not in bed? the boy asked himself. Has he recovered from smallpox?
But the physician's movements seemed to indicate an unwillingness to be seen by others. After a while, he crept towards the tiny shed that Ji Xiaofu and her daughter slept in.
Zhang Wuji's heart began to thump loudly as he thought: Has he gone to hurt Auntie Ji? I am not his match, but I cannot let this matter pass unheeded. Climbing out of the window, he followed Hu Qingniu as quietly as he could. Then, he saw the man sneak into Ji Xiaofu's shed. The shed had been put up haphazardly as a simple shelter against wind and rain, so it had no doors or walls to keep intruders out.
Zhang Wuji panicked and made his way quickly to the back of the shed. Crouching close to the ground, he saw Ji Xiaofu and her daughter sleeping soundly on a pile of straw. Meanwhile, Hu Qingniu took a medicinal pellet out of his shirt and put it into Ji Xiaofu's bowl of medicine before leaving as quietly as he had come. Zhang Wuji saw that the physician's face was still covered by the piece of black cloth. As he wondered whether the man had recovered from smallpox, a sudden and somewhat frightening realisation hit him: Mr Hu has been tampering secretly with the patients' medications during the night! That is why their injuries have not been healing.
Then, he saw Hu Qingniu entering the canopy where Jian Jie, Xue Gongyuan and the others slept, apparently to poison them as well. The physician did not re-appear for a long time, probably because each of the fourteen men required a different prescription. Zhang Wuji stepped quietly into Ji Xiaofu's shed and took a whiff of her bowl of medicine. It had originally contained a dose of Eight Immortals Soup (ba1 xian1 tang1), which she was supposed to drink first thing in the morning. Now, the decoction emitted a pungent smell. Just then, light footsteps sounded outside, indicating that the physician was returning to his room.
Putting the bowl down, Zhang Wuji called out softly: "Auntie Ji, Auntie Ji!"
As an accomplished pugilist, Ji Xiaofu's hearing and sight were very keen, so she would wake up at the slightest noise even when she was in a deep sleep. However, she was not aroused despite several calls from Zhang Wuji. The boy had to shake her on the shoulder seven or eight times before she finally opened her eyes and asked, "Who is it?"
"Auntie Ji, it is I, Wuji," he answered. "Your bowl of medicine has been poisoned, so you cannot drink it anymore. Pour it quietly into the river, and pretend that nothing is wrong. I will discuss the details with you tomorrow."
Ji Xiaofu nodded in agreement.
Then, fearing that Hu Qingniu might chance upon them, Zhang Wuji returned to his window and climbed back into his room.
After breakfast the next morning, Zhang Wuji and Yang Buhui went butterfly-chasing, running further and further away from Hu Qingniu's huts and the wounded men's canopy. Ji Xiaofu knew what the boy was up to, so she quickly followed them. Having seen Zhang Wuji take Yang Buhui out to play for the past few days, no one bothered about the three of them going off on their own. When they reached a hill about a li (500 metres) away, Zhang Wuji sat down.
Ji Xiaofu turned to her daughter and said, "Bu- er, let us not chase butterflies anymore. Go and look for some wildflowers and make three crowns, one for each of us."
Beaming with delight, the little girl went off as she was told.
Zhang Wuji opened the discussion with a question: "Auntie Ji, what conflict does that Hu Qingniu have with you? Why does he want to poison you?"
"I have never met Mr Hu," answered Ji Xiaofu, somewhat taken aback by the boy's train of thought. "I have never even seen his face to this day, so what conflict is there between us?" After a moment's pause, she added, "When Father and Teacher talk about Mr Hu, they mention only his unsurpassed abilities in medicine and refer to him as the best physician in the land. It is really a pity that he has chosen to walk in heretical ways as a member of the Ming Sect. My father and my teacher do not know him either. Why … why does he want to poison me?"
Zhang Wuji proceeded to tell her how he had seen Hu Qingniu sneak into her shed to poison her the night before. Then, he said, "Your bowl of Eight Immortals Soup emitted the pungent smells of the venus-hair fern (tie3 xian4 cao3) and the Bone-Piercing Fungus (tou4 gu3 jun1). These two plants have certain medicinal properties but they are too poisonous to be used in heavy doses. They are also counteractive to the healing properties of the eight herbs in the Eight Immortals Soup. Although the dosages that had been used were insufficient to kill, they would have nevertheless prevented the complete recovery of your injuries."
"It is even more puzzling that the other fourteen men are also affected," Ji Xiaofu remarked. "Even if my father or the E-mei School had offended Mr Hu by accident, all these fellows could not have been involved as well. It is just too coincidental to be true."
Undaunted, the boy pressed on with his queries. "Auntie Ji, Butterfly Valley is very remote," he said. "How did you manage to find this place? Who is that 'owner of the golden flower' who hurt you?" After a slight pause, he added, "Perhaps, I should not be asking you about these matters because they do not really concern me. But the entire episode has been so strange. Please do not be offended."
Ji Xiaofu turned red, for she understood the meaning behind Zhang Wuji's words - he was concerned that his questions might be related to her being an unwed mother, hence answering them would put her in a very awkward position. Yet, she went ahead and gave him a reply: "You saved my life, so what else is there that I should keep from you? Furthermore, you treat Bu- er and me very well. You may be young, but you are also the only one in this entire world whom I can share the deepest difficulties of my heart with."