Can light float?

Lin Luoran discovered that light could float when she was a little girl. Back then, her family lived in a tile-roofed house. Sometimes, the tiles would break and the roof leaked whenever it rained.

Her dad would pick a sunny afternoon and use a bamboo ladder to get on the roof. He would replace the broken tiles with new ones. This was every man living in the countryside had to do. It was called “house-gathering”.

Lin Luoran didn’t ...