For the sound of Langlang Book in the mountains of the plateau, the reporter of the People's Liberation Army Daily, Chen Xiaojing, and the correspondent, Li Xuewen, Long Tongqing, are preparing for classes in the dormitory. Teach children. If the ages of 20 to 30 were defined as the golden decade of life, first class sergeant Long Tongqing, born in the late 1980s, dedicated his most precious time to the guarding mountains and the children in the mountains. In 2006, Long Tongqing joined a border defense regiment in the Shannan Military Division of the Tibet Military Region. At the same time, he made an important decision - to follow the company's veteran Du Guosong and use his spare time to teach at the only primary school in Kada Township, located in the city of Cuona. Kada Township, with an average elevation of over 4000 meters, is hidden among the ice peaks at the southern foothills of the Himalayas. The unique geographical location has created a stunning natural landscape here, while the continuous snowy mountains block the passage for local Tibetan people to go out, making it an isolated island of snowy mountains. Kada Township Primary School is embedded on the mountainside of a snowy mountain. People refer to this place as the "Rock Climbing Slope" and it requires climbing stones to get through. In the 1980s, it took the stationed military and civilians ten years to dig a way out of this mountain. Before 2008, these so-called roads were actually dirt roads slightly wider than normal patrol roads. In recent years, with the renovation of dirt roads, the connection between Kada Township and the outside of the mountain has become smooth. For Tibetan children in the mountains, no matter how high the mountain is, it cannot stop them from pursuing their studies. What they crave the most is to be able to sit in the classroom and read like children in the city. Letting a child read is to cultivate a pillar. Long Tongqing has been guarding Kada Township for 17 years, and the term "military teacher" has also been used by the children for 17 years. Nowadays, there are still many "military teachers" like Long Tongqing who volunteer to teach in the Kada Border Defense Company. They patrol the border defense lines and relay to protect these children, becoming lifelong friends for them. In recent years, children from good families have gradually moved to the city to study, or simply followed their parents who went out to work to go to school elsewhere, but many children still stay in three natural villages in Kada Township. As long as there is one child left in Kada Township Primary School, our teaching activities will not stop. "After the patrol mission that morning, Long Tongqing and several new soldiers from the company once again arrived among the children. Long Tongqing tutored a Tibetan child who had just turned 7 years old in the classroom of Kada Township Primary School. Before joining the army, Long Tongqing stayed in the city for a period of time and had a good job. He enlisted at the border of the plateau and was once lost in confusion. It wasn't until Du Guosong, a veteran of the company, walked into Kada Township Primary School and saw the eager eyes of Tibetan children that Long Tongqing felt that he should stay. Last year, Long Tongqing, who had been in the military for 16 years, was about to reach his service life. He called his wife. His wife's words plunged him into contemplation: "Your eyes are the most energetic only when you are carrying out border patrol tasks and teaching the children." When he hung up the phone, Long Tongqing's mind was filled with scenes of him teaching the children. Every plant and tree here needs you, and the children here also need you. "Long Tongqing then ran into the old school of Kada Township Primary School at school