Is it true that Zhou Youwang was over 50 years old when he played the vassal in The Fire?

If this story is as recorded in the history books, it is probably true.

According to the records in Mandarin Zhengfeng, the story of Cong Si's birth is legendary. It is said that there were two dragons in the Xia Dynasty that praised the former king. According to divination, Wang Xia stored the dragon's saliva in a box. This box spread from Xia Dynasty to Shang Dynasty, then to Zhou Dynasty, and was not opened until Zhou Liwang. The dragon's saliva flowed to the court and could not be removed. Zhou Liwang asked the woman to shout without clothes, and her saliva turned into a black catfish and entered the palace. There is a concubine in the palace who met her before she changed her teeth. At the age of fifteen, she became pregnant and gave birth to a baby when she became king. The concubine was so scared that she abandoned her children. The baby was later picked up by a passing couple and taken to the land of praise. She was a later compliment.

As can be seen from this record, Bos was pregnant in the last few years in Zhou Liwang. Zhou Liwang died in 829 BC. Suppose the box containing dragon saliva was opened in 844 BC. According to the age of children changing their teeth at 6-7 years old (when she was 7 years old), she 15 years old gave birth to Zan, which happened to be during the reign of Zhou Xuanwang. She died in Zhou Xuanwang (783 BC) and was 46 years old. She was in Zhou Youwang for three years (779 BC).

The earliest record of praise is in the Book of Songs: "Celebrate the week and praise it." But judging from these records, Cong Ji seems to be a poor woman, too. First, she was abandoned as a baby and then sent to the enemy country as a gift. It is normal that she doesn't like to laugh.