1. It means that you are not a fish.

2. Zifei Fish is from Zhuangzi's Zhuangzi. Autumn water. Original: Zhuangzi and Keiko swim on the Hao Liang. Zhuangzi said, "Is it a pleasure for fish to travel leisurely?" Keiko said, "If you are not a fish, how can you know the joy of fish?" Zhuangzi said, "If I'm not the son, how can I know that I don't know the joy of fish?" Keiko said, "I'm not a son, and I really don't know a son;" Zi Gu is not a fish, but he doesn't know the joy of fish. " Zhuangzi said, "Please follow its origin. Confucius said,' You know fish well', and he asked me since he knew what I knew. I know it well. "