The bald man looked up suspiciously and saw Ning Dai looking at him with a smile. He could not help but be stunned.

There was actually such a beautiful woman in this world? She was not inferior to a celebrity at all.

"Are you the disciple of this old man?" he asked hesitantly.

Ning Dai nodded. "Yes, my master has a strange temper. He doesn't accept disciples casually."

"Okay." The bald man was a little disappointed.

"Are you a local?"

The bald man shook his head and said, "I'm not. But I've lived here for a few years and am very familiar with this place. You can ask me anything you want to know."

Ning Dai said, "Help me find a few more local people to come over. I want to understand some things. Is that okay?"

The bald man smiled and said hurriedly, "Of course. How about this? I'll bring you to the village. I'll introduce you to whoever you want to know."

Ning Dai turned to look at Mo Chen. Seeing that Mo Chen nodded, Feng Tian also came over and said, "I'll go too."

"Hey, Little Dai'er, don't leave me behind," Ji Nian shouted and hurriedly followed.

They soon arrived at the village headquarters. There were a few people in the courtyard basking in the sun. Ning Dai observed their faces. They were all covered in a faint green color. It was obvious that they had this unknown 'virus' in their bodies.

When they saw a few outsiders coming to the village headquarters, those people looked over in surprise. Fortunately, Baldy went up to them and said something to them. The vigilance on their faces gradually disappeared.

"Are you really here for the free treatment?" the oldest old man asked suspiciously.

Ning Dai was stunned and couldn't help but give the bald man a thumbs up. By using the 'free treatment' method, they avoided having to introduce themselves, which was very convenient.

"You guys go inside and talk. I'll go and call a few more people for you," Baldy said with a smile and left the village.

It was probably because the bald man had told the village that there was a 'free treatment' activity in the village. More and more people came to the village. There were men, women, old and young. This saved Ning Dai and the others from having to run errands to find people to take samples.

While taking their pulse, Ning Dai casually asked them some questions, such as their daily diet, defecation, time of work and rest, and whether they had any abnormal feelings, etc.

What surprised her was that the people here more or less had some symptoms. The difference was that the symptoms of the younger ones were lighter, while the symptoms of the older ones were more obvious.

"Dai'er, drink some water when you're tired."

Mo Chen saw that she had been working the whole morning and was so busy that she didn't even have time to drink water. His heart ached as he brought her a cup of warm water.

At that moment, it was like a bright ray of light shining into Ning Dai's mind. She suddenly thought of the question that had been lingering in her heart, but she couldn't explain it clearly.

Those who went out from time to time, those who did not like to drink water, even if they were older, their symptoms were lighter than those who stayed in the local area.

Could it be that the cause of the symptoms was the water here?

"May I ask where is the well in the village?" Ning Dai quickly stood up and asked.

An aunt took Ning Dai to the well at the village entrance. There was no tap water here. The villagers all drank from this well.

"Senior Brother, take this water to be tested." Ning Dai scooped up a cup of well water and handed it to Feng Tian.

"Wait, let me see."

Ji Nian hurriedly reached out to take it. He smelled the well water and took a small sip, carefully tasting it.

Ning Dai looked nervously at Ji Nian, but he didn't seem to taste anything. He took another big sip.

"Ptui, this water is so astringent." Ji Nian spat it out, stomping his feet and shouting exaggeratedly.

A middle-aged man shouted at them, "We've been drinking this water for more than ten years. This is what it tastes like."

"Dai'er, look."

Mo Chen suddenly pointed at the watch on his wrist and shouted.

Ning Dai curiously leaned her head over and saw that the needle on the dial was constantly shaking. Ning Dai watched curiously. She suddenly noticed that Ji Nian had brought the water over without her knowing when, so she hurriedly told her master to stay away.

Sure enough, when the cup of water was taken away, the shaking of the needle was slightly less.

"Senior Brother, go get more water," Ning Dai instructed Feng Tian.

Feng Tian looked around and found a bucket. He brought a bucket full of water over.

Sure enough, the shaking of the needle on the dial was even more intense.

"It's magnetic force," Mo Chen said calmly. "The strength of the magnetic field will affect the movement of the needle. If I'm not wrong, there is a very strong magnetic force in the water."

Feng Tian nodded. "I understand now. The 'magnetic force' you mentioned is similar to the radioactive element. It seriously affects the various functions of the human body. That's why so many people here have the same symptoms."

"Is it the problem with this well?" Ning Dai turned her head to look at the well. It was a very normal rock. She walked over to take a closer look and found that the needle on the watch had indeed changed greatly.

"Let me take a look." Feng Tian suddenly said, "The qigong I practice can sense the existence of magnetic field. If it's magnetic force, I think I can definitely find the source of the magnetic force."

Ning Dai and the others stayed far away from the well and let Feng Tian use qigong to find the source of the magnetic force.historical

Seeing Feng Tian take the horse stance and get ready, he frowned. After searching for a long time, he suddenly frowned and muttered, "That's not right..."