In addition to the basic methods, the Supreme Treasure also teaches you the essentials of your hands.

The hand is the key to grasping the fulcrum and maintaining the balance of the body in climbing, and the strength of the arm directly affects the quality and effect of climbing. Therefore, a good climber must have sufficient finger strength, wrist strength, and arm strength. For beginners, when they are not good at making full use of the strength of the lower limbs, the movement of the arms is more important. How to exert the arm, the situation is different when climbing the artificial rock wall and the natural rock wall climbing, the former requires the first knuckle to tighten the fulcrum at the same time, the wrist should be tense, the palm should be attached to the rock wall, and the forearm should also hang down with the palm close to the rock wall, and when the pull-up, the fingers (grip point) have the action of pressing down and lifting the arm, and the action law is that the center of gravity activity trajectory changes little, and the rhythm is more obvious. However, when climbing the natural rock wall, its action changes greatly, and various force methods should be used according to different fulcrums, such as grasping, holding, hanging, picking, picking, pinching, pulling, pushing, and supporting.

For foot movements, the key to a good climber's climbing technique is whether the strength of the legs can be fully utilized. Climbing with arm strength alone can't last. The essentials of the foot movement are to rotate the legs outward, the inside of the big toe is close to the rock face, the legs are slightly bent, and the fulcrum of the foot is used to maintain the center of gravity of the body. However, it is important to remember that the knee should not touch the rock face, otherwise it will affect the support of the foot and the balance of the body, and even cause slippage and knee injury. In addition, when stepping on the fulcrum with your foot, do not use too much force, and grasp the direction of force.

The other is the coordination of hands and feet, where excellent climbers, the upper and lower limb strength is used in coordination. Upper body strength is even more important for beginners or unskilled climbers, who tend to climb with pull-ups and lower limbs to lift their legs and move their bodies. If the strength of the upper limbs is poor, it is easy to get tired when climbing, which is manifested as weakness, soreness and numbness of the arms, and gradually loss of grasping ability. After losing the ability to grasp, it is difficult to maintain balance even with good lower body strength. Therefore, to learn rock climbing, we must first practice the strength of the upper limbs, and the upper limbs should be mainly based on the strength of the fingers, wrists and arms, and then cooperate with the strength of the ankles, toes and legs, so that the center of gravity of the body moves in a coordinated manner with the different directions of force, and the coordination of hand and foot movements is also free.

Supreme Treasure carefully checked whether the seat belts on their bodies were fastened one by one for the PLA who were preparing to climb, and required each PLA to be able to climb a distance independently to see if their physical strength could withstand such a long climb. Fortunately, these are all carefully selected talents in the PLA, and everyone can successfully climb a section of the cliff, and people with strong physical strength like Li Da and Lu Xiaoyu have climbed more than half of them.

"Chairman, I didn't expect this rock climbing to be so interesting, I was a little scared, but when I actually came up, I realized that the protection measures were actually not so scary. Instead, do you feel very comfortable? Right, Fourth Brother? Li Da asked excitedly.

"Second brother, don't look too good, have you forgotten what the chairman said just now? How should I put my hand? How should the feet stand? These are all to be strictly observed, be careful when something goes wrong, but no one can help you, but there is an abyss below, you see? Lu Xiaoyu reminded.

Lu Xiaoyu didn't say anything, as soon as he said that Li Da looked down, the more he looked down, the more scared he became, and his legs trembled unconsciously.

"Oh mom, it's quite scary, what are you going to do now?"

"Don't look down, just climb up just like you're on flat ground, and the more you look down, the more nervous you get. If you really can't bear it, go straight down. This main rope can also be lowered back, and when the time comes, I will let Li Yi and Xiao He send someone to meet us below, if there are soldiers who can't do it, just slowly descend it directly. The Supreme Treasure said to Li Da above his head.

Li Da thought to himself, how faceless it would be to come down! He looked around and no one was flinching, they were all holding back their strength to climb up, although it was just a training, everyone seemed to want to complete a whole climb, so Li Da naturally couldn't come down to make people laugh, he also had a horizontal heart, and climbed up the mountain in one breath.

Seeing that all the soldiers climbed up the mountainside one after another and no one had an accident or flinched, the Supreme Treasure also followed behind and climbed up in one breath.

"Excellent! All the soldiers of our PLA are good. I was worried that a few of you would give up because of physical exhaustion, but I didn't expect that all of you would have such perseverance and climb the whole way the first time. I'm so proud of you. ”

"Chairman, we're still a lot inferior in front of you, you scared me at that speed just now, and it's too fast, right? When I looked back before, you were still at the foot of the mountain watching us climb, but when I climbed to the top, you caught up with it in the time of a cup of tea, it was a god! Li Da exclaimed.

"Dazi, don't praise me, I think I was not as good as everyone at the beginning! Almost fell several times! I was scolded by the coach to the blood, you guys are the most savvy group of climbers I've ever met. I believe that this time we will be able to carry out our plan smoothly and strike the soldiers perfectly. ”

With the encouragement of the Supreme Treasure, everyone was as energetic as if they had been beaten with chicken blood, and the Supreme Treasure explained some tips to everyone, so that they could put on these equipment and go back to get ready to go, waiting for the time to go up the mountain when the time was ripe.

On the other side, he and Xiao He had more important things to do, that is, planting mines. Speaking of landmines, which are explosive firearms buried under the surface of the earth or laid on the ground, the earliest landmines originated in China. In 1130, when the Jin army attacked Shaanzhou, the Song army used "gunpowder cannons" (i.e., iron-shelled mines) buried in the ground to inflict heavy casualties on the Jin army and win. By the early years of the Ming Dynasty (14th century), real mines with mechanical firing devices appeared in China. According to the 1413 Jiao Yu's "Fire Dragon Sutra", a collection of "fried concoction with pig iron casting, empty stomach, put medicine pestle, into a small bamboo tube, through the fire line inside, with a long line outside through the fire trough, choose the only way, dozens of buried into the pit, the medicine trough through the steel wheel, the soil cover, so that the thief does not know, step on the engine, shake, the iron is like flying, the flame soars to the sky." ’

It can be seen that "explosives" are not only the earliest press-fired mines, but also similar to today's "chain mines", from which the term "mines" comes from. In 1580, when Qi Jiguang, a famous general of the Ming Dynasty of China, was stationed in Jizhou, he made a kind of "steel wheel fire" mine, when the enemy stepped on the motive, the steel wheel rotated and the flint sharply rubbed to ignite, detonating the mine. The drum firing device improves the accuracy and reliability of the timing of mine firing. In the documents of the Ming Dynasty, there are many kinds of mines recorded in detail, which shows that mines in China had developed to a certain level at that time, and mines only began to appear in Europe in the 15th century during the fortress defense battles.

After the middle of the 19th century, the emergence of various high explosives and detonation techniques made landmines standardized and diversified, thus giving birth to modern landmines.