The main contents are as follows:

1. This micro-lesson publicizes and educates the current pneumonia epidemic situation in COVID-19, so that primary school students can understand and master the epidemic prevention knowledge in novel coronavirus.

2. The correct wearing of masks, daily classroom ventilation and correct hand washing methods were explained, which further improved the epidemic prevention awareness of teachers and students.

3. Let students have a deeper understanding of epidemic prevention knowledge, and further educate students to establish life awareness and safety awareness, ensure the healthy development of students' body and mind, and enhance self-protection awareness and self-protection ability.