Once upon a time, there was a husband and wife, opened a hotel, because they sell wine at a good price, business is very prosperous. One day, the husband went out, the wife secretly mixed water in the wine, sold five dollars more. At night when her husband came back, the wife proudly told her husband his "secret", thinking that she would get her husband's praise.　Who knows, the husband heard, anxious feet jumping, holding headaches and crying, said: "Hey! You put our most valuable thing - credibility, only five dollars to sell!"　Sure enough, from then on their business was not as prosperous as before, and finally went completely bankrupt. When his wife was poor and sick and dying, she wept with remorse and said, "I understand ......"