Even Li Yun was impressed.

"Bufu narrowed down the doctors who had been in the area for ten years," Ju De explained. "We then found the four who were the most meticulous and had a cautious personality, and they are also skilled in surgery. It's likely they used organ harvesting as a way to get money and improve their skills."

"How did you manage to narrow it down to four so quickly?" asked Li Yun.

"My girlfriend, your girlfriend, your cousin, and their two other friends camped out at the hospital and chatted with everyone, with me pretending to be sick," Ju De said on the phone, sounding a bit annoyed.

"Why are you so annoyed?"

"I'm forced into this random detective club your girlfriend made up. I'm the only guy."

"Congratulations, you have a spring blossom harem."

"Spring blossoms my ass. They gossiped about the doctors and nurses like they know them personally."

A psychopath with five chatty university girls, it could be a show.

"Hey, you're not the only guy, you have two alumni sponsoring the club as well," said Li Yun.

"Are you seriously dating her just because she pulled a fast one over you?" asked Ju De.

"That's about it, does it even matter? We're just dating."

Ju De rolled his eyes, but then again, it was none of his business.

After talking to Li Yun, Ju De shared the information with Bu Tao, who started a more thorough investigation. During the investigation, they found one doctor with unusual spending habits during the past ten years, a general surgeon named Doctor Tsang.

Unfortunately, there wasn't any way to make a direct connection to the case. Being extra careful, there was no physical evidence to tie him with the case.

Li Yun arrived to Yide Hospital to search for Doctor Tsang. He had seen him once before when the man named Piwei was stabbed, and knew that he often worked in the ER.

Li Yun entered the ER in his white coat and surgical mask, and watched as Doctor Tsang checked on a patient who was rushed into the hospital after collapsing. The patient had a slightly bluish complexion.

Rouxi was partially right about the culprit. Doctor Tsang was a person who felt a sense of guilt, and overcompensated it by helping others. He was also justifying his actions, that everything he did was for the greater good. He was able to improve his surgical skills by operating on those people. Some had died, but it was their existing conditions that caused their deaths.

"A party with at least a dozen people coming in with food poisoning," someone announced on the loudspeaker.

There were more people coming in.

Li Yun was irked by how slow everyone besides Doctor Tsang was.

"Hey you! Grab the non-rebreather masks and prepare multiple ventilators for possible severe carbon monoxide poisoning!" Li Yun called out to the residents still handling non-critical cases.

The residents looked confused, but followed the command.

He quickly dialed Lao Yi Bao.

"Master Bao, how to increase oxygen intake on patients coming in with carbon monoxide poisoning?" Li Yun asked quickly on the phone.

Li Yun knew that even if they managed to save the incoming patients, they would suffer from the aftereffect. A good portion of people who had suffered from acute carbon monoxide poisoning will have other types of problems in the next ten years if not treated properly.

Hearing Li Yun's urgent tone, Lao Yi Bao didn't bother to greet him and immediately walked into the library to search for a manuscript.

"Grandpa, what's wrong?" Yi Ansha asked.

"Help me find the twelve jing needle point method."

Yi Ansha nodded and searched around. They found the document within minutes, and Lao Yi Bao explained to Li Yun the technique for every case they encountered.

"It's going to involve some proper breathing if the patient is conscious," Lao Yi Bao explained.

Li Yun inserted the first set of needles on a patient, and asked the nurse for more needles. Although the nurse had never seen him before, he wore a white coat and had an authoritative tone. She felt like she would be fired if she didn't listen and immediately went to get more acupuncture needles.

Once Li Yun got more needles, he inserted them in as many patients as possible and told the patients to breathe in deeply with their nose and then breathe out slowly from their mouth. The patients followed the instructions as they breathed in and out of the oxygen mask.

By allowing the body to receive more oxygen, it reduced the amount of carbon monoxide in the body. It was the basic treatment for carbon monoxide poisoning. However, with acupuncture treatment, hopefully it will reduce the problems the patients might encounter in the future.

"In the case of a condition of depletion and if the movement in the vessels is fine, the disease will be maintained for a long time. If the movement is massive and rough, it is a painful blockage-illness." - Ling Shu

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