The sun rises in the East, and the smoke curls from the kitchen. A group of yaks are looking for food in the mountains at an altitude of more than 4000 meters. Just after the beginning of autumn, Zhuoga began to get busy early in the morning in the temporary plank house. After milking, she skillfully operated the milk separator to make butter. Although she is in her 60s, she is agile and hale and hearty. Zhuoga's favorite thing to do is to look at the Yumai Valley in the distance. Among the green mountains and green waters, the bright five-star red flags on the roofs of every household flutter in the wind. Also fiery red are the five-star red flag painted on the big stone in the mountains and the big characters "home is corn, country is China" on the hillside. The 3644 square kilometer Yumai township is like a pearl inlaid in the land of southern Tibet. It is far from the heart of the motherland, but very close to the sovereignty of the motherland. Due to its remote location and difficult conditions, Yumai Township once lived only Sanjie Quba and his daughters Zhuoga and Yangzong for a long time. It is called "three people's township". Father and daughter have stuck to the bitter and cold land for decades. Adhering to the firm belief that "home is corn, and the country is China", they have protected thousands of square kilometers of land by grazing at the border. They hang the national flag on every road they walk through. "No matter how hard and tired they are, they should protect every inch of the motherland.". "Only when there is a country can there be a home. Without the peace of the border, there can be no peace for all families." On October 28, 2017, President Xi wrote back to Zhuoga and Yangzong sisters, encouraging them to continue to inherit the spirit of patriotism and guarding the border, and to drive more herdsmen to take root in the snow border like gesanghua, to be the guardian of the sacred land and the builder of the happy homeland. "President Xi's reply is also addressed to all the Yumai military and people." After receiving the reply, the herdsmen and the garrison soldiers carefully framed the contents of the reply, placed them in a prominent place in their homes and posted them in the barracks window, which will be deeply remembered. Taking root in Yumai, building Yumai and protecting Yumai have become the common choice and conscious action of the military and people of Yumai. Bathed in the spring breeze of the new era, with the joint efforts of the military and the people, the former "Sanren township" has been built into a happy and beautiful well-off Township, and the lives of the villagers have become more and more prosperous. Today, a flat and wide asphalt road winds down from the Rila mountain at an altitude of 5200 meters, and the time for Yumai soldiers and civilians to go out of the mountain is reduced from 4 hours to 1 hour. The 5g communication base station soars into the clouds, and the radio waves span thousands of rivers and mountains. In the light steel keel structure of the Tibetan villa, TV sets, refrigerators, washing machines and other appliances are available, and more than 200 Yumai people in 67 households enjoy a happy time. In the professional cooperative of Yumai grass-roots supply and marketing farmers and herdsmen, villagers are rushing to make various handicrafts. On the training ground of a border regiment company of the Shannan military sub district in Tibet, the sound of killing by officers and men resounded through the valley... "We should write these into a letter and report them to President Xi!" This year marks the 5th anniversary of President Xi's reply to the letter. The two sisters are brewing the good news. Last year, Yumai Township opened a "Tibetan Hunan pig" farm, and the products were exported to Hunan. The dividends received by the villagers were full of money. Yumai township is in the forefront of Rural Revitalization and has become the "happy and beautiful border well-off demonstration township" of the Tibet Autonomous Region. Rich corn strengthens the border defense. Next to Zhuoga's new home, the six gilded characters "Sanjay Quba's old residence" on a house are particularly eye-catching. Since the renovation in July 2020, tourists have come in an endless stream