This is already a suburb of the city, seven or eight miles away from home, and the "poor" Ding Xuecheng can only measure the land with his feet.

"Beibei, the content of tonight's low-level event is "Common Ruler", it is not difficult to use various rulers to measure the size, but what if you can't find a ruler or it is inconvenient to measure? For example, how far do I walk back now, and how do I measure? ”

"In primary school, we learn the measurement methods of common rulers, such as rulers, triangles, soft rulers, steel tape measures, leather tape measures, etc.; In junior high school, science is divided into physics, chemistry, and biology, and in physics you learn special measuring tools and methods. Vernier calipers and spiral micrometers, such as macro measurement, are special measuring tools; There are also special measurement methods that change ideas, for example, using the continuous rotation of the wheel to measure the distance, multiplying the number of turns by the circumference of the wheel to get the distance, the odometer of various vehicles works on this principle, this method is called the 'roller method'. Of course, there is also the 'winding method' to measure the diameter of the filament, the diameter and circumference of the coarse object, and the diameter of the cylinder with the combination of a ruler and a triangle...... These will be studied in junior high school physics. ”

"None of these methods can solve the problem I said~"

"I mean, it's easiest to measure with a measurement tool, and sometimes you have to change your mind to solve the problem. To solve the problem you mentioned, there are no measuring tools now, and the special method I just mentioned is not used, so use the most primitive method to solve it - some parts of the human body are also a special ruler, for example, height, arm length, finger length, foot length, step length, etc., without requiring precision, they can be used to measure length. ”

"Oh~ I know, first measure the length of one step when I walk normally, and then count the number of steps I walk, and the product of the two is the distance."

"Hmm~ yes. You now have a sports data collection in WeChat on your mobile phone, which is an application in this area, and you can roughly know how much distance you have traveled in a day. From now on, I'll give you a little thread to count your steps, and when you get home, you'll know how far it is from home. ”

"However, the human body is growing, and those 'special rulers' are also changing?"

"When people become adults, they generally don't change, for example, try to open their thumb and middle finger, the average person is 20cm, and in life it is called 'Yizha (Hunan dialect is called Ka, into the sound)', which people use to measure distances that are not too large and do not need to be too precise; When an adult walks normally, the distance between two steps is about 1.5 meters, and you are two steps of 1 meter. ”

"Haha~ Okay, that's it! …… Beibei, you still have to pay attention to accidents, 'chivalrous righteousness' and 'saving lives and helping the wounded' will be carried out, so that you will get more righteous qi value! ”

"Don't worry, starting tomorrow, you go to school in the morning, and go to the hospital for physiotherapy in the afternoon, so as to earn righteousness points, and the days will be full."

"Alas~ If you don't win the jackpot, it's not bad to study and live like this...... Winning the lottery can change the trajectory of many people's lives......"

"Life is full of opportunities and challenges, standing at the crossroads of life, no one knows what will happen in the future, so there are so many joys and sorrows, love and hatred...... As with the mysteries of the universe...... Bobo ~ There is a case on the other side! The child and the woman are in danger, stop them! ”

Ding Xuecheng raised his eyes and saw that by the flower bed opposite, a middle-aged woman with a little girl of three or four years old wanted to cross the road. The trees in the flower beds on both sides blocked their view as well as Xing Xuecheng's view, and if there were cars in front of them, tragedy would have happened......

Ding Xuecheng heard Beibei's prompt and judged that there was definitely a vehicle coming from the opposite side......

His mind turned: "Gravity multiplier is off, attribute transfer - agility -10%, on!" ”

This operation was carried out by Ding Xuecheng with all his might, canceling the weight bearing and the transfer of attributes at the same time. His figure was like lightning, and in the blink of an eye, he crossed the road for more than 20 meters. Approaching the pair of grandparents and grandchildren, the front foot rubbed the ground, and the body slammed down, slowing down the impact and throwing the two people to the ground...... And there was a shrill horn and a "squeak" of brakes from behind, and passers-by were shocked by this scene.

"It's dangerous! If it weren't for this child, the woman and the child would have been hit squarely......"

"Wow~ How did that kid appear?"

"It looks like it's coming from the other side! That's called fast~ I thought it was dazzling! ”

"Look, did you break it?"

……

Although Ding Xuecheng tried his best to slow down, the powerful impact of the high-speed movement could not be unloaded, he took down the middle-aged woman, held the little girl in his arms, and rolled on the ground for many laps before stopping.

At this time, the little girl's cry of "wow" woke up the middle-aged woman who was in a daze, she got up in embarrassment, screamed and rushed to the little girl.

Ding Xuecheng stood up with the little girl in his arms, put the little girl on the ground, carefully inspected the little girl's body, and found that the little girl had nothing to do except be frightened.

Handing over the little girl to a middle-aged woman, Ding Xuecheng had time to check his physical condition. The elbows and knees of the sportswear were scratched, and the sole and upper of the forefoot of the right sneaker were torn, revealing a small half of the foot, covered in dust and dirt, and it was extremely embarrassed......

"Don't cry, thank that kid! It wasn't he who saved you, you don't know what to do now~ That's a big truck of dozens of tons! ”

"Tsk~ good luck...... Almost died! ”

"Sacrifice yourself to save others, but why didn't that kid go to school? It's school time......"

……

Ding Xuecheng was afraid of trouble, patted the dust on his body, and prepared to flash people.

"Thank you, little friend~ Thank you! ......" The middle-aged woman pulled the little girl over and thanked her.

"The driver came down, and the child's clothes were torn, so he asked the driver to pay for the clothes."

"The driver is not responsible, is he? It was caused by the woman's disobedience to traffic rules and her desire to cross the road. ”

"If a truck hits someone, how serious are the consequences? It's reasonable, the little boy helped the driver, and it's not too much to pay for a set of clothes, right? ”

"Well, that makes sense! Let's help that little boy together~"

In the crowd of onlookers and gossip, the driver's trembling heart calmed down, asked Ding Xuecheng's physical condition, and happily took out 300 yuan to Ding Xuecheng, and then drove away.

Ding Xuecheng gave the little girl 100 yuan, asked the middle-aged woman to buy something to eat to suppress the little girl's shock, and then slipped away in the middle-aged woman's gratitude and everyone's admiration.

"Beibei, how much righteousness did you get this time?"

"Very nice, 25 o'clock. However, it consumed 0.4 points of positive qi value, and obtained 24.6 points. ”

"So much? It's worth it! Saving two lives has 20 points of righteousness, why is there an extra 5 points? ”

"It may be that the trouble of the big truck driver was relieved and the loss was avoided, and he thanked you~"

Ding Xuecheng's mind was opened, and he hurriedly asked: "Saving people can get righteousness, and of course the rescued are grateful; Eliminate troubles and avoid losses? Driver thanks? In this way, you can also get positive qi value? The more people are saved, the more people will be thankful for relieving more people of trouble and avoiding losses? Is it possible to get more positive qi value? Isn't it like that...... Incense wishing power? ”