Hundreds of Lectures have given special lectures on the Book of Changes, but I think there is still a big difference in the level of the lecturers. Can you accept a higher level? ...

You mean Ceng Shiqiang's lecture. It's only introductory and superficial. In theory, the Book of Changes is indeed extensive and profound, with good annotations in all previous dynasties, which is rarely understood and accepted by people in this impetuous society. However, the problem of the earth's rotation period you mentioned has been solved in the Book of Changes-the compass for feng shui itself is arranged at 365 and a quarter, which means that each degree corresponds to one day.