At half past eight in the morning on Friday, September 12, 2043, the military training for freshmen on the playground of Communication University began on time. Instructor Yan's whistle blew, and the students quickly gathered three meters in front of Instructor Yan. After taking a break, standing upright, aligning to the right, and reporting the number, there were many of the 23 students in the class, and Instructor Liu also came to the training ground and trained with everyone.

Instructor Yan pointed to several sections of three-meter-high walls on the east side of the playground and said, "Students, who can climb over that high wall without any equipment." All the students present said, "No." Instructor Yan said, "Since we can't climb over that high wall without any equipment, but we need to climb over that high wall with our bare hands during the battle, what should we do?" Instructor Yan paused, as if to give the students time to think, in fact, Instructor Yan didn't want the students to answer, but just deliberately emphasized it to attract the attention of the students.

Instructor Yan said: "This is the group training we started today, the purpose of which is to cultivate the spirit of unity and cooperation among the students, so as to complete the training subjects that cannot and cannot be completed by individual soldiers. Climbing over the three-metre wall with bare hands and jumping over the high-altitude board are such team events, and students are asked to carry forward the spirit of teamwork in order to complete these two team training subjects. Today we trained to climb over the three-meter wall with bare hands, and the overall requirement was that it would take 23 minutes to climb over the three-meter wall. Think about how we can organize this task. Which student will talk about their thoughts first, everyone will speak casually, brainstorm for public welfare, and don't worry about what they say wrong. ”

At this time, I heard someone on the girl's side shouting: "Report." Instructor Yan said, "Huo Caixia, please tell me what you think." Huo Caixia said: "Use the method of building a human ladder." Instructor Yan said: "The idea is very good, but how to get past the last two students, this project requires all the participating members to climb over the high wall." Someone on the boy's side said, "Report." Instructor Yan said, "Shen Zhe, tell me what you think." Shen Zhe said: "The last person crosses the wall, we can use two classmates to sit on the wall and drag the last classmate over." Instructor Yan said: "If it seems feasible, let's test whether your plan is feasible." All of them, turn right. ”

The queue pulled in front of a three-meter-high concrete wall east and west of the playground. The students saw that this is a high wall, three meters high, the wall is wrapped in cement, and the wall is smooth and clean. The wall is two meters long and more than a foot wide, and it looks like it is specially designed for military training, and there are more than ten sections of the same high wall. There is a gap of more than two meters between each section of the high wall, so that the students can go back and forth during training.

Instructor Yan said: "Students, the initiative of training will be handed over to you, from now on, Instructor Kan, Instructor Liu and I are only responsible for timing the students, as long as the students all pass the high wall within 23 minutes as required, today's training will be over." Hearing Instructor Yan say this, the students were both happy and worried.

Why do you have such doubts, Chen Zhen next to him said what everyone thinks. Chen Zhen said: "On average, one minute per person, climbing over a high wall, is simply unwilling. Director Liu said: "Don't be discouraged, as long as we unite and cooperate, there is still hope for the goal to be accomplished." Huo Caixia said: "Students, listen to my arrangement. Everyone shouted, "Okay." ”

Huo Caixia said: "Li Xiaogang, Shen Zhe, Jiang Dajun and Ma Wangcai, you are out. The four shouted, "Yes." Holding his arms, he ran to Huo Caixia. Huo Caixia said: "The four of you, two of you will first build a ladder on this side of the wall, and the one close to the wall will stand, and the one will squat far away from the wall. The last two stepped on the shoulders of the two on the side of the wall and climbed over the wall, and then stood on the other side of the wall to answer the students over the wall. Shen Zhe said: "I understand, the four of us are the boat bridge troops of the class." Huo Caixia said: "The heavy responsibility is handed over to the four of you classmates." Shen Zhe and four other classmates shouted: "Guarantee to complete the task." Huo Caixia shouted again: "Di Tengfei, Zhou Zhuanghe." The two shouted, "Here." Holding his arms, he ran to Huo Caixia's squad leader. Huo Caixia said: "After the two of you set up the ladders on both sides of the wall, quickly go up to the wall and sit on the wall. Responsible for covering the students over the wall, and finally responsible for dragging the two students on this side of the wall over the wall. Xiao Di and Xiao Zhou shouted: "Guarantee to complete the task." Huo Caixia said: "Okay, let's start the first drill now, and ask two instructors and instructors to time it for us." ”

Huo Caixia shouted: "Are you all ready?" The students shouted, "Ready." The class leader stood at the end of the line and encouraged the girls: "Everyone should work hard, and the key to improving the speed of our class to cross the wall depends on our girls." Liu Yuexiao and other girls shouted: "Yes." Huo Caixia shouted: "Begin." Shen Zhe and Jiang Dajun quickly ran to the wall, Shen Zhe held his hands on the wall and leaned against the wall. Jiang Dajun squatted down, holding Shen Zhe's waist with both hands, and the ladder on the side of the wall between the two of them was set up. Li Xiaogang and Ma Wangcai ran to the human ladder and stepped on the shoulders of Jiang Dajun and Shen Zhe, Li Xiaogang climbed over the wall first, and Ma Wangcai followed over the wall and set up the human ladder on the side of the wall. On the top are Di Tengfei and Zhou Zhuanghe, after the two climbed the wall, they sat on the wall, their feet hung down to the sides of the wall, and kept their bodies steady. Later, Jiang Zhu, me and Chen Zhen stepped on the shoulders of Jiang Dajun, Shen Zhe, Li Xiaogang and Ma Wangcai, and under the cover of Xiaodi and Xiao Zhou, they crossed the wall.

After we climbed over the wall, the girls Ren Hongyu, Li Siqi and others climbed from one side of the wall to the other side of the wall. We stood on the east side of the wall and looked this way, except for Song Hua, who shook twice when he was on Shen Zhe's shoulder, was supported by Xiao Di and Xiao Zhou, and dragged him to the wall, the other students crossed the wall quite quickly, especially the short Wu Lin classmate, who was very skillful in his movements, as if he had been trained before. The last person to climb over the wall was the squad leader Huo Caixia, and Huo Caixia was also very stable over the wall.

When the hardest time came, Shen Zhe squatted down and let Jiang Dajun step on his shoulder, Shen Zhe pushed up and held Jiang Dajun up. Jiang Dajun, with the help of Xiao Di and Xiao Zhou, stepped on the shoulders of Li Xiaogang and Ma Wangcai and crossed the wall. The most left Shen Zhe who didn't climb over the wall, Xiao Di, Xiao Zhou, leaned over, one grabbed one of Shen Zhe's hands, and the two of them pulled Shen Zhe up to the wall. Shen Zhe, Xiao Zhou, and Xiao Di stepped on the ladder on the side of the wall and quickly went down the wall. The last Xiaodi who went down the wall landed with his feet, and Instructor Yan shouted: "Okay, all over the wall, it took thirty minutes, and everyone completed the task relatively well for the first time, which is gratifying." But after all, you are more than seven minutes, so please find out the reason for wasting time so that you can cross the wall faster. ”

After everyone looked for the reasons, everyone agreed that there were two reasons: 1. The girls were timid, couldn't let go of their movements, and wasted part of their time. 2, Xiao Di and Xiao Zhou have little strength, and they wasted part of their time when they pulled Shen Zhe over the wall. Around these two reasons, everyone agrees: 1. Girls should let go of their actions. 2. Let Xiao Di and Xiao Zhou come down from the wall and act as the first section of the human ladder, so that Shen Zhe and Ma Wangcai can sit on the wall.

After a ten-minute break, the training continues. In the morning, I completed four training sessions for 30 minutes, 28 minutes, 27 minutes, and 25 minutes. Two more training sessions started at 3 p.m., 24 minutes and 22 minutes. With the joint efforts of the whole class, we completed the first group training subject ahead of schedule in less than a day. The spirit of unity was praised by the two instructors, and Instructor Kan said: "Tomorrow and the day after tomorrow, there will be more difficult tasks waiting for you to complete next Monday." The students said, "Unite as one and overcome all difficulties." Instructor Kan said: "Okay, courage is commendable, today's training is here, everyone will have a good rest after going back, and disband." The classmates were still the same as before, and they disbanded on the spot with a cheer.