When the night falls, the light from the only bedroom in Sanhe Elementary School looks particularly tranquil under the deep blue sky.
There, Wang takes out a paper and pencil to help Chen with the homework.
Later, he helps Chen to wash and waits for him to fall asleep.
Wang then has time to briefly speak to his family on the phone.
Outside the window, the stars are afar; in the distance, the frogs are croaking.
Photos by Lan Hongguang
Xinhua
