The negative topic of "1" forwarded by hundreds of thousands of netizens on the Internet comes from the website of Xueersi Online School. In a video titled "Examples of Elementary School Mathematics Synchronous Full-Score Classes", a male teacher named Cui stood in front of the screen with "Weekly Negative Questions" written on the electronic blackboard behind him. In the video, Teacher Cui enthusiastically explained how to solve a math problem by solving a Chinese problem. When she finally got "1", Teacher Cui couldn't help laughing. After watching this video, many netizens commented that the questioner was too "sinister" and the topic was dubbed "undisciplined" math problem by netizens.