Introduction: At one time, there were as many as 4 million private teachers in rural China. In an extremely difficult environment, they have shouldered the heavy responsibility of "preaching, teaching, and dispelling doubts" for the 100 million rural primary and middle school students in the compulsory education stage, and have spread modern civilization to the most remote corners. More than 10 years ago, a song "Phoenix Qin" made many years of silent dedication in the mountain villages of the private teachers stand in front of the people of the country, countless readers have been moved, shed tears The author Liu Xinglong is still unfinished, and now with a "Skywalker" continues to tell the story of private teachers' hardship and hope, for these "folk heroes who silently ascetic on the land of China in the second half of the twentieth century" presented a tragic song that moved the heavens and the earth. "Skywalker" depicts several private offices in a village-run primary school in Dashanwo