The cafe in this hospital seems to change some of their potted plants. The green leaves of the philodendron in the cubicle pot reflecting the sunlights fall upon them. Bai Yutang frequently visited this cafe. Sometimes he asked about the plants to the owner. The owner of this cafe was a middle aged woman who loves gardening.
This time the owner told him about the magic of philodendron. Its heart-shaped leaves and trailing vines not only looked good to put as decoration, but also had the ability to purify the indoor air. It emits oxygen, humidity, and negative ions which remove dust, mold, and bacteria from the air. Bai Yutang made a note to himself that he wanted to buy some to put it inside their apartment.