The reason why Li Ting began to use handkerchief again is an environmental protection research.
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3. 李婷很努力，她是父母眼中的好孩子，老师眼中的好学生。
Li Ting works hard. She is a good child in parents' eyes and a good student in teachers' eyes.
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4. 李婷特别怀念使用手帕的那个年代，“小时候上幼儿园，老师都要检查小朋友带没带手帕。”
Li Ting really misses the time when everyone used a handkerchief, "when I went to kindergarten in my childhood, our teacher used to inspect to see if we brought our handkerchiefs with us."
