
It is the year 2025 now. Gao Wei works at a bank in Hohhot, in Inner Mongolia. He often spends his weekends and holidays picking up trash in the mountains.
Ten years ago, while hiking (徒步) in the mountains, Gao Wei saw lots of plastic bottles in the bushes. They made the beautiful scenery look messy (脏乱的), so he decided to clean them up. From that day on, every time he goes out, he brings a big bag with him. He picks up litter in forests, on grasslands, and along rivers.
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