Du Pan's horizontal bar teaching. (Photographed by Chen Long) "The toes, knees, and waist are straight and straight. After hovering for three seconds, the forearm drives the upper arm to pull upward, the jaw passes over the bar, and then the arm is released at a uniform speed..." On the equipment training ground, Du Pan, the second squad leader of a detachment of the First Mobile Corps of the Armed Police, demonstrated and explained the action rules to his comrades. For three years in a row, Du Pan has won the top three places in the first practice item of the detachment's individual sports skills competition, the horizontal bar, and is a prominent instrument coach in the squadron. The calluses on his hands are the "military merit badge" that Captain Du is proud of. Therefore, in the squadron, everyone has formed an atmosphere of how many calluses there are as the level of training effectiveness. "If the cocoon grows faster, the performance will be better." Coach Sang Long, a Hani rural boy from Xishuangbanna, Yunnan, is not tall and can endure hardships, and has a strong desire to challenge passing the 400 meter barrier. During normal training, he found that his 1.68 meter height was the most difficult and time-consuming when crossing the high board diving platform. After trying various jumping positions, I found that the "hanging leg" style is the fastest way to climb the board, but it is also the most prone to abrading the inside of the knee. In order to improve his training performance, despite the pain, he repeatedly practiced for ten times and repeatedly climbed for five days and ten days, until he became red, broke his skin, and cocooned. He no longer felt the pain, and his performance improved by two seconds. With this "cocoon grinding" effort, in 2021 and 2022, the team won the first place in the 100 meter obstacle event in the individual physical skills competition of the detachment for two consecutive years. Sanglong praised and returned. (Photographed by Zhong Xiangchen) "If the cocoon grows thicker, the speed will be faster." Wu Penghui, the squad leader of the blasting squad, is a tall and thin man with dark skin and an interest in sprinting. In the actual combat training of troops, both long-distance and sprint runs require standard training shoes, and professional spikes cannot be used to improve performance. Monitor Wu looked at his feet and thought that the shoes and the field could not be changed. He could improve his performance by increasing the friction between his feet and shoes. "So he often stood on tiptoe to practice picking the ground and wearing combat boots to practice running. I don't know how many pairs of socks he had worn out and how many pairs of insoles he had stepped on. Gradually, he developed calluses on his front feet that couldn't even scratch his nails, creating a pair of" human flesh spikes. "". Relying on this "cocoon" of tenacity and hard work, in 2020, 2021, and 2022, he won the first place in the detachment's individual physical skills competition in the 100 meter running event for three consecutive years, and was honored with personal third class merit for outstanding performance. Wu Penghui sprinted hard. (Photographed by Chen Long) "If the cocoon peels off a bit more, the fist will harden a bit." Corporal Lv Shiliang, who spent time in a martial arts school before enlisting, has made his mark in the subject of capturing enemies since enlisting. However, due to their small stature and short arm spans, they often do not have an advantage in confrontation. In order to seize the few opportunities to strike and give stronger blows to his opponents, he tied a sandbag to practice boxing every day, hit boxing targets to practice accuracy