On Wednesday, April 25th, the class teacher, Mr. Zhou, announced during the morning self-study: "Please get ready, and the teacher of the Learning Office will lead you to the Qixia District Taxation Bureau in Nanjing immediately!" Hearing this, the students were happy at first, and then they wondered: what are you doing in the tax bureau? Everyone thought about this problem all the way and unconsciously came to the gate of the tax bureau. After getting off the bus, the teacher said, "We are here to learn about taxation today!" This time, the students were not as happy as before, but fell into deep doubts: what is tax? What's the use?

With questions, the students threw themselves into another form of intense study. The teacher who taught us this time was a tax cadre sent by the tax bureau. The uncle explained the contents of the pictures carefully to us in standard Mandarin. Everyone listened carefully, and the pen in his hand was recording rapidly. Some students sometimes stop their pens and push their heads to other students' notebooks. It turns out that they can't write some words, or even understand their uncle's words, so they simply "copy" other students' words, so that they can come quickly and remember them accurately. There are also some students who have developed the habit of carrying a recording pen with them. As soon as they hear their uncle start to explain, they immediately turn on the switch and stick the recording pen directly to their uncle, as if they can't record all the explanations without touching his uncle's mouth.