Sister Ma Lin is the youngest of all the school doctors, and she is also the new school doctor who only joined the company a few months ago.

Lu Ran met him at the end of the second year of high school, and he had an appointment outside the school for a trivial matter, and the place where the fight took place was in the open space not far from the school gate.

Lu Rantian was not afraid, he slipped out of the school at noon, and faced the troublesome students and the five gangsters in society he called alone.

Who knows, before ten minutes have passed, this group of gangsters was directly beaten away by Lu Ran.

It's not that Lu Ran has any kung fu or infinite strength, but that he is not afraid of death.

At the beginning, Lu Ran found a yellow-haired little brother who looked fierce, but was actually weak. In other words, he said that he bit off the other party's ear alive and threw a series of heavy punches to the face, and the bridge of his nose was instantly broken.

Such an aura made everyone else stunned, just like a gourd baby saving her grandfather, giving Lu Ran heads one by one.

Of course, it's easy to say.

In fact, Lu Ran also suffered a lot of injuries, especially a cut mark on his arm that penetrated deep into the dermis and was twenty centimeters long.

Coincidentally, Ma Lin, who had just come to work at the school on her first day, passed by this open space.

Seeing that a group of thugs were actually beaten away by Lu Ran alone, he had a good impression of this young man, took Lu Ran to the infirmary, and kept this matter absolutely secret and would not affect Lu Ran's studies.

As a sports commissioner, Lu Ran is also in excellent health and rarely gets sick...... But occasionally, due to personality reasons, I will make an appointment with some disrespectful people.

Once injured, immediately find Sister Ma Lin to solve it privately.

"Lu Ran, it's you! What are you looking for me to do, it doesn't look like you're sick, is it? ”

"Sister Ma Lin, looking for you about the "note"?"

Ma Lin's eyes changed, obviously knowing about the 'deterioration of the note'.

"What, you kid won the lottery too?"

"Not me...... It's my classmate. ”

Lu Ran said, and handed the "note" to Ma Lin, who looked at the content on it, and his face changed, "A minute of soaking is enough to erode the flesh and skin, and even completely destroy the nerves in the hand, and then the right hand will be completely useless." ”

Hearing what the school doctor said, Wang Xiang almost burst into tears, and sat on the bed in the infirmary, his body trembling.

"Is there a way?"

"Yes...... However, after your friend has gotten through this, you'll have to come to the infirmary alone. ”

"When?"

"Come directly afterwards, if your homeroom teacher asks, I will give you a sick note."

"Good...... All right. ”

Marlene's solution is simple.

The "note" requires that the palm of the hand must be in contact with concentrated sulfuric acid.

So before contact, cover the palm directly with two layers of 'alkaline' substance.

Attached to the surface of the palm is a weak base such as sodium bicarbonate, and the outer layer is covered with a layer of sodium hydroxide, a strong base that is enough to support for a minute through the 'acid-base neutralization' reaction (dangerous action, do not try).

But this process will inevitably cause the palm to be slightly corroded and heat-scorched, and Wang Xiang needs to grit his teeth to endure it.

"Brother Xiang, let's go."

…………

In the dark laboratory building, under the method given by Sister Ma Lin, Wang Xiang successfully survived the difficulty, and the words on the "note" disappeared.

"Thank you, Brother Ran! If it weren't for your help, my hand would have been useless...... Let's hurry back to the classroom, the laboratory building is pitch black, and it's weird and scary. ”

"Hmm."

As the note burns out, the two descend the stairs.

The experimental classroom where the two stayed was on the second floor, but after walking up a staircase, they were unable to reach the bottom floor...... Still on the second floor.

"What's going on?"

"Brother Xiang...... Follow me. ”

Lu Ran led Brother Xiang to continue down the first floor, but there was still no exit, and the long laboratory corridor corresponded to on the right, and the standard on the second floor of the laboratory building was very conspicuous.

"Let's try to see if the mobile phone can contact the outside world, Xiang ......"

Just when Lu Ran turned his head, Wang Xiang, who should have followed closely behind him, disappeared.

"Oops...... Ran to help and encountered this kind of thing. ”

Lu Ran's back continued to heat up, making him stay calm, and slowly reached out to touch the mobile phone in his trouser pocket to turn on the video mode.

Suddenly, it felt like something liquid was spilling over the shoe......

Looking down, the blood flowing down the stairs had already overflowed the soles of Lu Ran's shoes.

At the same time, a large number of limb fragments kept rolling down the stairwell...... Lu Ran decisively turned on the night shooting mode at the first time and recorded all this situation.

Faced with this scene, ordinary people will inevitably sit on the ground in fright.

Lu Ran silently recorded the 'bloodshed scene'...... Until the corner of the upper staircase, a miserable white foot stepped out.

"The chainsaw is not around and there is no fire source, so if you don't do it, you will die."

Lu Ran immediately put his mobile phone back in his pocket, rushed to the corridor of the laboratory, jumped over the guardrail and jumped from the second floor of the laboratory.

"Smack!"

With his feet firmly on the ground, he ran in the direction of the brightly lit school building.

Just when Lu Ran ran more than 200 meters away, and then looked back in the direction of the experimental building, he saw a girl in a red school uniform standing in the corridor waving to him.

"I have to call the police, and then find a way to rescue Brother Xiang."

Lu Ran had just run back to the teaching building and was about to call the police when he found Sister Ma Lin standing in the corridor waiting.

"Don't call the police if you're fine, come and tell me what happened in the laboratory building?" Under the tudging of Sister Ma Lin, Lu Ran returned to the infirmary first.

…………

"Sister Marin! Time waits for no one, my classmate Wang Xiang ......"

"Lu Ran, what are you talking about? What Wang Xiang? Marlene looked puzzled.

"It's the boy who came to the infirmary with me just now."

Who knows, Ma Lin immediately waved his hand to interrupt Lu Ran's words:

"Wait, I didn't see any Wang Xiang, it was you who dragged the note alone and ran to the infirmary to find me with an anxious face...... Moreover, you go to the laboratory building alone. ”

"Alone?"

Lu Ran immediately looked at his right hand, and there were still traces of acid corrosion on the surface.

"This ...... Sister Ma Lin, wait a minute, go to the classroom and come back immediately. ”

Lu Ran struggled to run back to the classroom, only to see that Brother Xiang was studying hard and had never left the classroom at all.

Indeed, it was Lu Ran who got the "note" from the beginning.

Alone he went to the infirmary to ask for a solution, and then went to the laboratory building to complete the request for a "note".

When Lu Ran returned to the infirmary again, Sister Ma Lin did not anticipate in advance and quickly pierced the needle into Lu Ran's right wrist.

"Sister Ma Lin, you are ......"

"Don't move, you're evil."

As Marin twitched the syringe, she pulled out viscous dark blood.

Lu Ran didn't feel the slightest pain, but felt that part of the cold in his body was taken away.

Sister Ma Lin stored the blood in the syringe in the test tube and said lightly: "Yan Musen should have told you about the office, right?" How well is it considered? Join us and keep you safe. ”

"Sister Ma Lin, you?"

"Second Detective, Marlene. Raquel, a Chinese-American ...... At present, he is mainly responsible for investigating the "note incident" in No. 9 Secondary School. ”