C303

Nanmen Feng didn't care too much and continued to head upstream. However, when he reached 500 feet deep, he saw a full moon!

Nanmen Feng went down another 1000 feet, but he still saw the crescent moon.

Nanmen Feng gradually discovered a pattern after wandering around a few times.

At 300 feet, it was a crescent moon.

A full moon appeared at a hundred and fifty feet.

At one hundred meters