One person is a doctor and the other person treats water.
They have been best brothers for twenty years. Cheng Leyang said "I will protect you", and Jiang Lang believed him for twenty years.
Later, Jiang Lang died late one night, and the number dialed on his cell phone was empty.
Cheng Leyang didn't believe that he died suddenly from overwork. He dug out Jiang Lan's cell phone, which contained seventeen unsent drafts, including the last voice message. Jiang Lang called his name on the phone and asked, "Are you here?"
He was only two days away.
The mountains and rivers are still there, but the old friends are gone.
Intention: A doctor can save the lives of others, but cannot save his own illness; a water healer can stop the water of a river, but cannot stop a person from sinking.