I opened the curtains in Jiangsu Province and directed the vocational schools to enjoy their dancing on the ice and snow. The textbooks encountered in the culture class are "three brothers" and "five sisters-in-law" greeting with lesson plans, and the mathematical answer doesn't care about the smooth road at your feet at all. Against the backdrop of snowflakes, the white and red cotton-padded jackets washed by the girls seem to be rejuvenated again, and the young man can't restrain his inner excitement.