The Kazan River border defense is hidden in the folds between the Alatau Mountains and the Berzhentao Mountains. Overlooking from above, the rugged and winding roads are inlaid like branches and leaves. At the end of the road, there are ancient powerful glaciers and towering boundary tablets. This little known place had no road. Sixty years ago, a team of the Chinese People's Liberation Army came here after a long journey to set up a camp. It was named Kazan River Frontier Company because of its location. Since then, officers and soldiers have made their own way in this desolate wilderness. Once these roads have been passed, we can't forget the scary places like "Despair Slope" and "Death Valley", which will settle in the bottom of our hearts and become an indelible memory of life. These roads are very close to the clouds and far away from home - standing at the top of Sarkandaban Mountain, 4200 meters above sea level, it seems that you can touch the clouds with your hand; Even at the end of the valley, you can't see the towns and people. On this road, there are no flowers and applause, no spotlight attention, only ruts, horseshoe prints and the footprints of officers and soldiers. Get on your horse and start patrolling. Staff Sergeant Zhong Jun clearly remembered that when he first walked on this road, he looked at the road embedded in the clouds in the distance and felt an indescribable taste in his heart. Now, walking on the patrol road again and looking into the distance, Zhong Jun's eyes are full of fearlessness and perseverance. He knew that the road far away was the road of youth forged by the company officers and soldiers with optimism and tenacity, and it was also an ordinary and wonderful road decorated by boundary markers and snow mountains. The river is murmuring and the horses are clattering. Like Zhong Jun, the company officers and soldiers fused their youth with this distant river valley. "Don't be afraid. Only those who are not afraid can have a way." There was no way at the border. Where the officers and soldiers went, there was a way. The roads of the Kazan River are rarely traveled and are often daunting - the cold and anoxic snow roads, the steep cliff roads, and the dangerous rock roads... These roads are so dangerous that some cannot even be defined by the term "road". Conquering these roads requires courage and perseverance, and requires officers and soldiers to "rush" forward step by step. On the patrol road to Baskandaban, there was a place called "Death Valley" by the officers and soldiers - a 5-kilometer long valley paved with fallen boulders, and the boulders on both sides were falling. Every time officers and soldiers patrol here, they have to be careful and use both hands and feet, and even keep their voices down. "Keep your weight down and keep your steps firm..." On this road, Zhong Jun always walks in the front row, teaching skills to the recruits behind him, watching the wind and grass moving on both sides with alert eyes. "This road is not a narrow escape, but many risks are uncontrollable..." Zhong Jun said that when he crossed the "Death Valley" for the first time, a gust of wind suddenly blew. The "Stone Rain" came at once. In a panic, Zhong Jun accidentally stuck his foot in the stone crack. Fortunately, a huge stone in front of him blocked the falling stone, which saved Zhong Jun's life, but a 5cm long cut was made on his left leg by the stone. After returning from that patrol, Zhong Jun added a training item to himself: pass the boulder quickly