Origin: Folk proverb, the Yellow River has been diverted many times in history, and the village on the east bank of the Yellow River has become the west bank of the Yellow River after many years of diversion.
Quote: Chapter 46 of Wu's Scholars: "Mr. Da, thirty years east, thirty years west. Just like thirty years ago, I saw with my own eyes how magnificent your two houses were. Now Peng Jia and Fang Jia are getting better every year. "
Description: The Yellow River has high riverbed and serious sediment deposition. In ancient times, the productivity was low and often flooded, so the Yellow River was often diverted. After the diversion, a village on the west bank of the river was changed to the east bank. So it is called thirty years Hedong and thirty years Hexi.
Extended data
Words to describe thirty years of Hedong, thirty years of Hexi;
First, rapid change.
Interpretation: refers to rapid and many changes in a very short period of time.
Source: Wu Zhu's "History of Pain" The sixteenth time: "The military situation is changing rapidly, not to mention we have to go to the south for several days. Even Premier Wen at this time doesn't know where it is? "
Second, times have changed.
Interpretation: As time goes by, the situation changes.
Source: Liang Qichao's "The Future of New China": "Things have changed today; This book is naturally useless. "