On November 14, residents of Kangle, Lujiang, and Datang villages in Haizhu District, Guangzhou, who were sealed off, pushed down the isolation barriers set up by the government, and some overturned police cars. This is the most intense resistance of the domestic people against the government's epidemic prevention measures in the past three years. Why did this kind of resistance happen in Guangzhou, and why did these residents gather together to attack the fence? What does this incident mean?