The autumn season in Qingyang County is fierce. The sun is shining so hard that the asphalt road is billowing with heat. Even the dogs on the roadside are lying under the wall with their tongues hanging out, too lazy to move. Under the locust tree in the backyard of the county school, there was a rare shady spot. Shen Yu'an was sitting on a stone bench, teaching "The Analects of Confucius" to several elementary school children.