Half an acre of square pond opened, and the sky was overcast.
How can the canal be so clear? Because there is inexhaustible living water for it.
Meaning: Why is the small square pond always so bright and quiet, just like a mirror, clearly reflecting the floating sky and clouds? Because it has a source of living water flowing.
2. Wan Q ǘ Ndan Looks, Wan Ewan Tou Shǔ i Lai.