Zhao Changfeng came to the bedroom building and was about to go upstairs, but the old Liu Tou, who was watching the door, stopped him: "Zhao Changfeng, Zhao Changfeng, wait a minute!" ”

Zhao Changfeng stopped and looked at Lao Liu Tou vigilantly: "Old Liu Tou, I gave money for that big bag of instant noodles last night!" ”

Old Liu Tou's face turned red, and he grinned toothlessly and said, "I know that you have given the money for instant noodles, and I won't be wrong this time." At noon, someone called you several times, oh, this is his phone, and he told you to call him back when he came back. ”

Zhao Changfeng took the piece of paper handed to him by the old man and saw that it was an unfamiliar number.

"Old Liu, why do you just have a phone number? What's this person's last name? ”

"He called, called...... Oops, I remember it well, but I couldn't remember it when you asked me so suddenly. Old Liu was so anxious that he scratched his ears and cheeks.

"Okay, okay, old Liu, don't think about it if you can't think of it!" Zhao Changfeng waved his hand and said, "Next time, remember to write the person's name on a piece of paper in addition to the phone number." ”

Old Liu Tou glared at Zhao Changfeng resentfully, and scolded in his heart: Stinky boy, if I hadn't been literate and couldn't write a few words, with my pure poor middle peasant background, I would have become the accountant of the village committee a long time ago, and I would still be here to watch the gate for you?

Zhao Changfeng didn't have the heart to pay attention to the old Liu's resentful eyes, he was wondering in his heart who would call him? I don't know who it is, so Zhao Changfeng is reluctant to return this call. You must know that to return this call, you will waste Zhao Changfeng's five cents. He didn't reply, but he was worried that others would find him in a hurry.

You can't blame Zhao Changfeng for being stubborn, you must know that his total assets are less than ten yuan now.

Zhao Changfeng struggled a little in his heart, and finally decided to return the call.

Old Liu Tou smiled and took the five cents thrown by Zhao Changfeng and moved the telephone to the window.

"Hey, hello. I would like to ask, who called me at noon? Who am I? Changfeng Zhao, North China University of Finance and Economics. Oh, you guys are from the Central Plains Provincial Blood Bank? ”

Five minutes later, Zhao Changfeng finally figured out the situation. He put down the phone and was about to leave in a hurry, but Lao Liu Tou shouted in the window: "Zhao Changfeng, the phone has been on the phone for more than three minutes, you can make up another five cents!" ”

"Old Liu, you're fucking in the eyes of money! I'll make it up to you when I come back! Zhao Changfeng roared, and rushed out of the dormitory building without looking back.

Out of the dormitory building, Zhao Changfeng ran wildly all the way, and the speed was so fast that the students on the road smacked their tongues.

"Hey, isn't that Zhao Changfeng, the vice president of the student union of the college? His running posture is so handsome, I like him so much! A girl clasped her hands on her chest, looking at Zhao Changfeng's rushing back and acting like a nymphomaniac.

Her boyfriend stood aside with an ugly face and sneered, "Handsome? No matter how handsome it is, it's a fart. Could it be that because of his handsome running posture, the national experience will select him to prepare for the Atlanta Olympics in '96? ”

On the right side of the main entrance of North China University of Finance and Economics, there are always a few taxis parked. These taxis are expensive, and only the big students in Caida are willing to take them. Of course, those Kaizi boys who are in love will occasionally sit once and a half when they accompany their girlfriends to the city center to shop.

Zhao Changfeng quickly ran out of the school gate, came to the green taxi at the front, opened the door, jumped into the car, gasped and said: "Healthy road, Central Plains Province blood bank!" ”

The taxi sped all the way, and twenty minutes later, it came to the gate of the Central Plains Provincial Blood Bank.

At the door of the blood bank, a female doctor in a white coat accompanied a girl in a mink coat to look around. Zhao Changfeng stepped out of the car and shouted at them, "Who is Dr. Zhang?" I'm Zhao Changfeng. ”

"I am, I am!" The female doctor hurried over to greet her.

The girl in the mink coat walked to the taxi, threw twenty yuan to the taxi driver, and then hurried towards Zhao Changfeng.

"Hey, wait a minute, I'm looking for you five dollars." The taxi driver shouted.

"No need to look for it!" The girl said coldly without looking back.

The taxi driver squeezed out an ugly smile on his face, and scolded in his heart: "Grandma, if I didn't see how beautiful you are, I wouldn't have bothered to shout this!" ”

This taxi driver is used to slaughtering customers at the gate of North China Finance Gate, and this is the first time in the world that he charges according to the normal fare, but he didn't expect to hit a nail.

"Zhao Changfeng, thank you for coming over in time. This is Lin Xinping, a family member of a patient who is in urgent need of blood! Dr. Zhang introduced.

"Mr. Zhao, thank you, thank you!" Tears flashed in the corners of Lin Xinping's eyes, and her grateful look concealed her deep anxiety.

"Miss Lin, you're welcome!" Zhao Changfeng waved his hand and said: "It's important to save people, I'll talk about these kind words later." ”

"Yes, what Zhao Changfeng said is right. Let's go, we'll give you a briefing as we go. ”

It turned out that three months ago, North China University of Finance and Economics had organized a voluntary blood donation activity for college students. At that time, Zhao Changfeng had just been discussed and approved by the general party branch of the department to become a probationary party member, and he also served as the vice chairman of the school's student union, so he naturally had to take the lead and play an exemplary role. Fortunately, the amount of blood donated is not much, only 200 milliliters, and with Zhao Changfeng's sturdy body, this amount of blood donation will not have any impact at all.

Before donating blood, various physiological tests should be done, in addition to checking whether the blood donor has various infectious diseases, it is to check the physiological indicators of the blood donor. For example, blood type, liver function, cholesterol content, and so on.

Of course, Zhao Changfeng's physiological indicators were normal, but his blood type attracted the attention of the blood bank staff.

There are many systems for blood group classification. For example, the ABO system, which we are familiar with as normal people, is typed according to the antigens contained in red blood cells. According to the antigens contained in red blood cells, they are divided into blood type A, blood type B, blood type O and blood type AB. According to this blood group classification system, Zhao Changfeng is AB blood type.

In addition to this blood group classification method, there is also a more commonly used RH classification method. In the 1940s, scientists discovered that most people's red blood cells contain a type called Rh antigen (also known as D blood group antigen). In medicine, the blood type of a person who contains Rh antigen in red blood cells becomes the surname Rh Yang. And those whose red blood cells do not contain Rh antigen are Rh Yin surname. Among them, people with the surname Rh Yang can accept the blood of people with the surname Rh Yin, but people with the surname Rh Yin cannot accept the blood of people with the surname Rh Yang.

The classification of Rh blood group is not simply to divide people's blood types into two types: Rh Yin blood type and Rh Yang blood type. This classification method should also be combined with the ABO blood group classification system, which is divided into eight blood types, including Rh Yang blood type A, Rh Yang blood type B, Rh Yang blood type O, Rh Yang surname AB blood type and Rh Yin surname A blood, Rh Yin surname B blood type, Rh Yin surname O blood, and Rh Yin surname AB blood type.

Among Chinese, the blood type of the surname Rh Yang stands for the vast majority, with a high proportion of 99.7 percent, while the blood type of the surname Rh Yin only accounts for 0.3 percent. Among the 03% of people with the surname AB, the ratio of the four types of blood with the surname A, B, O, and AB is 3:3:3:1, which means that people with blood type AB like Zhao Changfeng only account for 3/10,000 among Chinese, which shows how rare it is!

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