Make money through official document education. This thing is easy to earn. You don't need a substitute teacher, just find some part-time students as teachers and you can correct your homework. The operating cost is low, a few exercise books don't need much money, and students charge low fees, which is in line with parents' expectations. Money is collected by the month. The teacher who counsels and communicates with parents must be fooled, and smart parents cannot see through these things. Official document education refers to an educational method based on official document form. Its main purpose is to make students understand and be familiar with the basic norms of official document writing and master the skills of official document writing, so as to handle all kinds of official document affairs smoothly in the future.