According to historical records, it should be 4732.

It should be 1.7 million years since Yuanmou man (primitive man).

The Shang Dynasty was founded around 1700 BC, so it is 1700+20 15, which means 37 15. This is the history that China began to record things in words. Before Shang Dynasty, there were Xia Dynasty, Three Emperors and Five Emperors, and ancient mythological times.

Sima Qian's historical records began with three emperors and five emperors. Huang Di was born in 27 17 BC, so it is 27 17+20 15, which is the history of 4732.

There was a lot of history before the three emperors and five emperors. If we start from the earliest Yuanmou, then the history of China began 6,543.8+7,000 years ago.