Useful. The speaker of this lecture is Yin Zhenyang, a foreign language teacher and class teacher in the middle school affiliated to Southwest University, a member of Master Zhang's studio, and a master of psychology in Southwest University. Due to the epidemic, schools are closed and students are suspended. Yin Ge became the anchor to teach students to learn. Yin Ge's sermon was full of dry goods, and the lecture was very good and useful.