Fourteen days passed, and finally the most tense moment came.

We calculated, and in about ten minutes, someone opened the small hole in the iron door and threw dry food and mineral water in.

"Be ready at all times, keep your arm muscles tense to a certain level, and the moment you see him throw something in, immediately attack and pull his hand in!" Physician Liu said, his tone was extremely calm.

"Okay...... I got it! I gritted my teeth and nodded.

"Remember the eight words...... Quiet as a virgin, moving as a rabbit! Dr. Liu finally said.

I walked to the iron gate, crouched, and was ready for anything.

As the minutes ticked by, I could clearly feel sweat on my forehead.

……

I stood there and waited for more than half an hour, but there was no movement. Could it be that they changed the time of delivery of food? Or did they learn about our secret escape plan?! No way! The biggest possibility is that they forgot to send something.

I walked to the crack and heard the sound of Dr. Liu's breathing.

"Doctor, they didn't come." I whispered.

"I know, it's estimated that it will come later, you are ready to stay near the iron gate at any time!" Physician Liu said.

"Okay." I nodded and went back there.

A few more hours passed, and no one came. My highly tense body was starting to get a little tired, so I walked over to the crack and talked to Dr. Liu.

"It seems that today will not come, tomorrow ...... Don't train just yet, just lie down and rest. Recharge your energy and succeed tomorrow! Physician Liu said.

"Okay." I replied.

Lying on the cold concrete floor, I remembered my rat friends, so I whistled, and within two seconds, they immediately ran out of the sewer, approached me, and played with me.

I put the scraps and powders of the dry food in the palm of my hand, and they jumped, wrapped around my palm, and ate mischievously, and then made a rattling sound.

I'm leaving you tomorrow, thank you for being with me for so long, and I'm going to miss you when I go...... I muttered to my mouse friends.

……

I waited until noon the next day, but no one came.

We have run out of dry food and almost no water. If they don't come again within a week, we'll probably starve to death.

Why not come? It's weird...... We didn't dare to train anymore, for fear that they would suddenly open the iron door.

In this way, I waited until midnight, and I was so tired that I lay down and rested.

I don't know how long it took, but in a daze, I suddenly heard a few loud bangs!

"Bang! Bang! ”——

I opened my eyes and saw two bags of dry food and a few bottles of water beside me.

Why did they arrive two days so late? I got up and asked Dr. Liu.

"Did they find something?" I say.

"Probably not...... I think it's possible that we miscalculated the time, because, we've completely reversed black and white, and what we thought was night could be their day! Dr. Liu exclaimed.

"Oh...... It's really possible. "It dawned on me.

"Then we'll start counting now, and we'll see if we'll be ...... next time," I continued.

"That's right! Let's start training, warm up and make up for the lessons we missed yesterday! Dr. Liu exclaimed.

"Okay! Doctor, after yesterday's gathering momentum, I feel like I've experienced a big battle...... But next time, I'm sure I'll be able to be calmer! I replied.

"That's right, we must fight a war with certainty, and we must be more foolproof!" Physician Liu said.

I nodded. Started running laps and doing push-ups, then martial arts training.

……

During the break, Dr. Liu continued to teach me some knowledge.

"What did we talk about the day before yesterday...... I want to think about it...... Oh yes, you know what? If a person's internal organs are broken, there will be a special smell of internal organs. I've smelled it, it's terrible! It was a terrible experience! Physician Liu said.

"Huh? There is also a breath when the internal organs are broken?! "I was amazed.

"yes...... Oh yes, today we're going to talk about poisons. How to recognize poison and tell which symptoms are caused by which poison! There is also a way to detoxify...... This is very important, because we must have a wealth of knowledge in this area to better prepare for it! Dr. Liu continued.

"Okay...... Poison, I used to hear about some people being poisoned on the TV news, and it seems that many people are still using poison! "I was immediately interested.

"First of all, let's talk about the division of toxicity levels, I'm talking about normal people! The most powerful is level 6 poison, less than 5mg/kg can kill people...... Then it is extremely toxic, less than 7 drops; Grade 5 is 5-50mg/kg, about 7 drops to 1 scoop; Grade 4 is also very poisonous, about 50-500mg/kg, which is 1 scoop to 1 ounce; Grade 3 is toxic, 0.5-5g/kg, about 1 ounce to 1 pound; Grade 2 is mildly toxic, 5-15g/kg; Grade 1 is slightly toxic, more than 15g/kg...... Gao Yue, you probably know about this knowledge! Physician Liu said.

"In fact, the poisons I am referring to are mainly some elements of nature, and the ingredients contained in them are toxic to humans, and some of them are relatively well-known. For example, arsenic, which is a kind of element, can no longer be decomposed, is widely used in industrial production, so it is relatively easy to obtain, including many household products: wallpaper, paints, paints, etc...... Arsenic is present in trace amounts in the human body, and it ranks 20th among the 103 most common elements in nature. Also called arsenic. The toxicity of arsenic is under the category of 5 (extremely toxic)! Pure arsenic is a gray crystal that is metallic; Under natural conditions...... It is a white powder. We often say that poisonous arsenic refers to this! ”

"As far as I know, many of the murders are in the form of solid swallowed food, sometimes as a vapor or as a poison. But there is a difference between the symptoms of solid and gas poisoning. Let me tell you about the symptoms: the skin of the poisoned person will develop a rash and even cause skin cancer. The most common are severe stomach pain, diarrhea with blood, vomiting, drop in body temperature, drop in blood pressure, dizziness, cramps, and in severe cases, coma, cessation of blood circulation leading to death...... If it is not sudden death, then the poisoned person will have symptoms of headache, slurred speech or paralysis, and within a few days, arsenic will invade the liver and kidneys. Arsenic can generally be found in the hair, nails, and urine of a patient, but in the case of sudden death, arsenic can be found in the digestive system. Chronic poisoning patients will have extreme pain in the hands and feet, local swelling, hair loss, heart failure...... The onset of arsenic poisoning is ...... Symptoms will appear within 1.5 hours at the earliest, and those who are acutely poisoned will die within 24 hours! Physician Liu said.

"Huh?! So terrifying? Arsenic is very common! Is there any way to detoxify that? I asked out loud.

"There is a way to detoxify, which is gastric lavage, injection of 'coagulant', and finally kidney dialysis surgery. Here I want to emphasize that the symptoms of arsenic poisoning are similar to gastritis, and chronic arsenic poisoning can cause colitis! Therefore, many people who are poisoned usually think that they have gastritis and colitis at first! Until arsenic finally invades the liver and kidneys, and after deep poisoning, it will be too late! I have dealt with several such cases before, and it was very painful after being poisoned, which is really unbearable for ordinary people! There is a case of poisoning, which is very bizarre and terrifying, and we will talk about it in detail after we get out......" Dr. Liu sighed.

"Oh my God......" I said in horror.