What is the concept of 5.67 billion years?

5.67 billion years-56 is the birth of a country with 56 nationalities, and 70 million years will be the time when it will appear. In ancient times, there was a jiazi in 30 years, a jiazi in 60 years in the period of Sakyamuni Buddha and a jiazi in 90 years in the period of Maitreya Buddha. 70 million years is the beginning time of Jiazi's 90 years. Don't you see that the four seasons have changed now? Who can know the mystery? Yutanporo flowers appear all over the world. Is our understanding incorrect? Because the Buddha said: the appearance of this kind of flower in the world means that the holy king appeared in time and began to preach the Dharma.