When the group returned to the foot of Luofu Mountain, it was already late, and there were no bright lights on Bian'an Street in the mountain, only the sky full of stars and the waning moon hiding behind the branches.

Wang Qian, Zhao Zhiyi, and Wan Jinyan were born in official families and lived in the residential area of the Great Song Dynasty officials; Qin Yuanfan, Zhu Zhen, Jiang Shike, and Nie Tongtong are businessmen who live in a wealthy area on the streets of Bian'an; The rest of Li Shui and other friends are all ordinary people in cloth, living in small courtyards around Bianliang. Xu Yun instructed Zhao Zhiyi to take Wang Qian and Wan Jinyan back to Xuanling Street, Zhu Zhen took Qin Yuanfan, Jiang Shike, and Nie Tongtong back to Bian'an Street, and he escorted Li Shui and other students to their homes one by one, there would be no danger on the avenue, but the probability of accidents on the lonely path at night was obviously much greater.

So the soldiers divided into three ways, each going back to his own house to find his own mother.

When Xu Yun finished sending off the last student, the last sound of the third watch had sounded, he looked up at the stars in the night sky and the waning moon surrounded by it, and always felt that the moon did not want to be the moon, if it was possible, he would also be one of the stars in the sky, bright and bright together, dark and dark, not lonely, nor lonely.

He walked leisurely in the direction of Bian'an Street, and suddenly he laughed lightly, "This long night, there are always people waiting for him quietly, he~"

He withdrew his bag from his back and placed it aside, thinking that he would have to tidy it up later when he got back, otherwise he wouldn't be able to tell the bunnies tomorrow.

The man who was hiding in the shadows never appeared, and he was still hidden in the night, only countless bows and arrows came from all directions, and the arrows were quenched with poison, and they looked particularly gloomy in the moonlight, and they were ready to kill him without showing up.

Xu Yun's figure danced in the moonlight, forming an air circle that blocked all bows and arrows that tried to shoot him, until the last bow and arrow fell to the ground, and not a single bow and arrow approached him.

Xu Yun knew that they had run out of ammunition and food, so he no longer gave them a chance, reached out and grabbed his bag and hung it on his back, and then used light skills to leave at a very fast speed.

Just as Xu Yun's figure was about to disappear around the corner of the street, a masked man whispered, raised the corner of his left lip, held a bow and arrow in his hand, and shot his first arrow tonight, and their last arrow tonight.

When they chased after them, they saw only drops of red blood on the street corner.

Xu Yun was hit by an arrow in his right leg, but he still gritted his teeth and held on to the Haolai Inn. After arriving at the room, he asked Xiao Liu to boil a bucket of hot water, then closed the door and treated his wounds by himself, he had been like this for so many years, he had already learned to heal his injuries from continuous assassination and injury, not to mention the various elixirs that Xia Yingying gave him at the beginning.

He pulled out the poisoned arrow that had penetrated deep into the flesh, and the place where the arrow was hit was already black, he disinfected it with sake, selected one bottle from the pile of medicine bottles, poured out a blue pill, crumpled it and sprinkled it on the wound, wrapped it in gauze, wiped himself briefly, and then opened the manuscript of the day, and began the work of the love of his life under the dim oil lamp.

The next day, when Xu Yun dragged his lame leg into the classroom, the students' mouths were all open into an oh shape, he was too lazy to deal with them, and when he got up this morning, he felt that the poison on his leg had dissipated, but this right leg was afraid that it would be lame for ten days and a half months.

The attentive Zhu Zhen hurriedly supported Xu Yun, "Master, are you okay?" ”

Wan Jinyan didn't know where to move a chair, and helped Xu Yun sit down with Zhu Zhen, "Master, you sit in class, you are tall, we can all see it." ”

Xu Yun was amused, but he didn't shirk it, he missed this pure concern, "Okay, then I'll sit and give you a lecture today." ”

Seeing the worried expression on the student's face, he smiled and said, "It's not a big deal, don't worry, it's just that I bumped into it on the way back yesterday, and it will be fine after a few lame." ”

"Okay, have you all done your homework yesterday?" Xu Yun turned to Zhu Zhen, "Does the class representative collect homework?" ”

Zhu Zhen hurriedly handed the stack of papers that she tried her best to tidy up but was still a little messy to Xu Yun, "Master, I've taken it, I'm waiting for you to take a look." ”

Xu Yun saw it quickly, and after about a quarter of an hour, he raised his head from a stack of homework and said slowly: "Everyone has done a good job, it is the first time to have such a result, it is very surprising to me, it seems that our hard work yesterday is not in vain." "I thought to myself that the injury he suffered last night was not in vain.

"Woo~, hahahaha, we are really the best teenagers in Bianliang City hahahaha......" The sound of slapping the table continued, everyone looked up to the sky and laughed, nostrils facing the sky, and they were proud.

Xu Yun let them finish laughing before he spoke: "Zhiyi, your method is very good, can you introduce it to all of us?" He smiled at Zhao Zhiyi with relief and encouragement.

"Xueba, Xueba, oh, oh......" Zhao Zhiyi came to Xu Yun in an exclamation to take over the homework he had handed in, pasted it on the wall above the podium, turned to face down, or towards that person, proud and introverted, calm and self-controlled, and said: "Actually, I went down the mountain early yesterday and have been waiting for you at the foot of the mountain." ”

Wan Jinyan immediately answered: "Hey, I said that I didn't find you for a long time with Ah Qian and Yuanfan yesterday, and you kid didn't tell us when he went down the mountain." ”

"You were all doing what you were doing at hand, and I went down the mountain myself." In fact, he waited for Ah Qian for a long time before going down the mountain, but he saw that she had been busy and didn't even raise her head, so he went down alone.

Qin Yuanfan said dissatisfiedly: "What are you doing when you go down the mountain?" Is it possible to measure the height of the Love at the foot of the mountain? ”

Zhao Zhiyi pretended to nod mysteriously, "Exactly." ”

Wang Qian's eyes rolled to the sky, and she made a sturdy ball of paper and smashed it at the young man who was pretending to be on the podium, "You are pretending again, believe it or not, I will beat you flat?" ”

Zhao Zhiyi rubbed his delicate nose and immediately accompanied the smiling face: "Oh, isn't this just to say." ”

"Cut~" This tsundere young master can only be cured by Wang Qian, everyone sneered, and Xu Yun seemed to be smiling.

Zhao Zhiyi put his finger on the paper, "I followed the shadow of Luofu Mountain and walked forward in total, a total of 1,433 steps", when the words fell, his fingers also stopped, "I measured it when I went back last night, and my step was about two inches." ”

Wan Jinyan answered: "Oh, oh, I know, so that you can calculate the shadow length of Luofu Mountain, but ...... However, you still haven't calculated the height. ”

Zhao Zhiyi smiled, seeing that Wang Qian's left hand was habitually placed on her chin, knowing that this meant that she was thinking, the corners of his mouth raised higher: "I am right, so I calculated that the shadow length of Luofu Mountain on the ground is two hundred and fifty-eight zhang and three feet," he put his hands on the two dots on the paper, indicating that this section is the shadow length.

"At the same time, I found a small tree in the woods and measured its shadow length in the same way." The delicate jade finger pointed to a vertical line on the paper, roughly used to replace the tree in his mouth. As soon as the words fell, he had already seen Wang Qian's left hand put down, and he knew that she had understood.

Later, he said more quickly, "Well, if you calculate the height of the small tree, you can calculate the height of Luofu Mountain, which is 447 zhang and 5 feet." ”。

He turned to look at Xu Yun, "Master, I don't know if I'm right?" ”