Dreams*
Once, in a faraway place, Zhuang Zhou dreamed he was a butterfly, a fluttering butterfly.
What fun he had, doing as he pleased. He did not know he was Zhou. Suddenly he woke up and found himself to be Zhou. He did not know whether Zhou had dreamed he was a butterfly or a butterfly had dreamed he was Zhou.
Infrared healthy street lamps for the public
Infraraed-Wall which contains air-filter to purify polluted air space such as Subway station.
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