Luofu Mountain is not high, but it is also the highest peak in the inland city of Bianliang. There is a temple on the top of the mountain, the name is called Hanshan Temple, the golden top is brilliant, the bright pillar is plain and clean, the weather is solemn, it is the place where the Great Song Dynasty holds the sacrificial ceremony every year, and the incense is extremely prosperous on weekdays.

No, when the master and the students of Yancang Academy climbed to the top of the mountain, Hanshan Temple was already full of pilgrims, melodious bells, and light smoke.

They sat on the sunny side, the snow on the ground had melted, and scattered young grass had grown on the bare ground, revealing a faint vitality.

"Ouch, I'm getting up, I'm tired!" Zhu Xiaopang sat on a rock, like a puddle of fat lying down.

"Go, go, Chubby, leave some space for me, I'm tired of killing master." Wan Jinyan unceremoniously shrugged Zhu Zhen's head and sat down.

"Fat, you occupy such a big place by yourself, and you don't let us live, move away, move away." A group of people moved Zhu Zhen, whose buttocks were not yet hot, to the ground, and they all twisted and divided the big stones, panting for breath.

"You're too much! I want to sue Master! Zhu Zhen turned over with difficulty, moved slightly to a cleaner lawn, and continued to bask in the sun and lie down.

Qin Yuanfan spread out a piece of dark green silk, and put all kinds of food, pastries, and water bladders in the bag on it, and sat on it with Zhao Zhiyi looking forward to it, waiting for Wang Qian behind.

In the end, Xu Yun took Wang Qian's hand, and the two finally came up, and met Zhao Zhiyi and Qin Yuanfan with cold eyes. Xu Yun shuddered, and shook off Wang Qian's hand as if nothing had happened, Wang Qian didn't care, grinning and throwing himself into a pile of food, revealing the happiest smile of a foodie.

"Wow! Yuanfan, you must have brought it, right? Oops, I love you so much! Wang Qian hurriedly unpacked Qing Fengxiang and took out a delicate box of pastries, "Wow, wow, wow!" It's still my favorite chestnut cake, it's so delicious! ”

As soon as it was opened, the fragrance spread out, and the teenagers who were tired and paralyzed all stood up with a carp, and surrounded Wang Qian with a loud voice, and poor Wang Qian's little head was squeezed like a pot of rice balls.

Wang Qian took a lot of effort to squeeze out of this group of gobble-up rice balls, and walked to Xu Yun with half a chestnut cake and a water bladder, "Oh, eat it, how much can you pad your stomach." ”

At this time, Xu Yun was already observing the melting of the snow in the shade of Luofu Mountain under the sun, and carefully thought about how to measure, calculate, and record it later. It was when he was pouring his whole heart that he was slapped by Wang Qian coldly, and he couldn't help but shiver for the second time today.

Smelling the fragrance of the pastry, Xu Yun did feel a little hungry, but he looked at the pastry that was obviously saved from someone's mouth, and he couldn't taste it, he took it awkwardly and ate it twisted, "Wow, it tastes good~" secretly delighted.

"How do you calculate the height of Luofu Mountain based on how fast the snow melts? Need my help? Wang Qian found a slightly clean place next to Xu Yun and sat down, she hugged her knees with both hands, and it was still a little cold near the side of Shanyin.

Xu Yun glanced at Wang Qian, who shrunk and trembled, his hands clenched into fists in his sleeves, and just as he made up his mind, Zhao Zhiyi walked over from behind and draped the coat in his bag over Wang Qian.

"Zhiyi, I knew it was you, thank you!" Wang Qian turned around and smiled sweetly at Zhao Zhiyi.

Zhao Zhiyi gently scratched her little nose, "Hmph! How many times did I say before I came, it was colder in the mountains, and in the end you still didn't bring it. ”

"Hehe, you're not going to bring it to me anyway!" Although this muttering was quiet, it was heard in the hearts of Xu Yun and Zhao Zhiyi, the former frowned slightly, and the latter was sweet.

Xu Yun stood up and saw that all the students were eating and drinking well, and looked around energetically.

"Come on, come on, everybody, and tell me what you're going to do later." Xu Yun beckoned the students to come around.

"Master Xu, it's already all together." Zhu Zhen said responsibly.

Xu Yun: "Okay, you can send them this pile of paper later, one for each person." ”

Zhu Zhen hurriedly stepped forward to take it: "Okay, Master!" ”

Xu Yun: "Today's hard climb to Luofu Mountain is not only for a trip, but the most important thing is to teach you how to re-acquaint yourself with Luofu Mountain, which you have known for a long time. ”

He looked at a pair of puzzled eyes, and said with a smile: "Don't be too nervous, the first time I used it for you to practice." ”

"Do any of you know the height of Luofu Mountain?"

"Master Xu, it took us an hour and a half to climb the mountain, and our pace can be measured, so can we also calculate the height of Luofu Mountain?" Qin Yuanfan obviously has more travel experience.

Xu Yun nodded approvingly: "Yuanfan said it very well, but have you ever thought about whether it is the height or slope of Luofu Mountain that is calculated like this?" ”

"Height? Slope? What's the difference? "I couldn't figure it out.

"Master Xu, what do you mean by the height of the longitudinal ground at the top of the mountain, and the slope is the distance we walk up along the surface of Luofu Mountain?" Zhao Zhiyi asked.

"Oh~" The beings were in an uproar, so it was, it was really the talent of the champion, admired and admired, and the sycophants were repeated.

Xu Yun laughed: "It's true that Zhiyi said, so what we need to measure today is the height of Luofu Mountain, not the slope, can you understand now?" ”

"Understood~"

"Okay, the paper I have prepared for you, it is thick and not easy to scratch coarse paper, the pen I have instructed you to bring in advance, in order to get down the mountain before dark, we have two hours to record the information, don't rush to calculate it, first record or draw the collected information, go back and calculate, and hand it to me tomorrow in class." Is this clear to everyone? ”

"Master Xu, you didn't say what method to use to calculate, so what should we record?" Wan Jinyan said with a bitter face.

"Yes, Master Xu, then we don't know how to do it?" Others followed suit.

Xu Yun laughed: "Haha, since I tested your own way of getting along and measured, how could I tell you directly, so what is the point of our hard work to come here?" Haha......" After speaking, regardless of their complaints, he walked to the shade and continued to observe.

Seeing that Xu Yun didn't pay attention to them, the students didn't think it was interesting to shout, so they scattered, holding the pen and pinching the paper with a sad face, and measuring the height in confusion.

Wang Qian no longer pestered Xu Yun, eagerly found various places and angles, and finally stopped in one place and concentrated on tinkering.

At this time, Zhao Zhiyi had already started to do it, and he breathed a sigh of relief in his heart, but he didn't want to lose half a point to Xu Yun.