1. Archaeological evidence so far shows that Chinese civilization had a relatively complete evolutionary sequence 6000 years ago or even longer.

2. According to historical records, since the Yellow Emperor, there has been a relatively complete inheritance record. Moreover, according to the analysis, the highest regime in China has a relatively complete succession sequence from the Yao Emperor. Emperor Yao is the pre-flood period recorded in historical books.

3. China myths and legends have a very complete early, middle and late flood structure:

At the beginning of the flood, the sun (sunny day) disappeared in the generation pointed out by teacher Yao Di (shooting on the ninth day, implying that there was only one sunny day in the flood period), indicating that the early flood was a very long and extensive rainstorm scene. If we look at the legend of the great flood abroad, some islanders in the ocean see a sharp rise in sea level, which lasts for a long time, resulting in only a few peaks on the island still on the horizontal plane.

In the middle of the great flood, in the early days of Emperor Yao, and in the period of Gun, the flood continued and raged repeatedly. In the face of the super-long flood era, the Huaxia nationality is not good at fighting floods. With the reform in Yao Di period, the organizational ability gained from the reform in Shun Di period was greatly improved, and an effective flood fighting operation was organized (that is, the gun period). For various reasons, the flood control failed.

In the later period of the flood, Shun Di period was roughly from the death of Gun to Dayu's final victory over the flood. During this period, not only the organizational strength of the Chinese people was greatly improved, but also their experience was increasing day by day through long-term flood fighting. Combined with the fact that foreign flood legends have been established and the sea level has risen sharply, it is likely that the sea level will drop sharply in the later period of the flood. Although there is still a lot of rain, the flood crisis is coming to an end. In addition, Dayu's strategy of combining water control with dredging is effective, and a large amount of flood water will be led to the sea. And finally succeed.