What's the difference between I ching and I ching?

There must be a difference between I ching and I ching. The Book of Changes is essentially a book about predicting the development of future events, and the Book of Changes is a book that summarizes the laws and theories of these predictions. Yijinjing: According to legend, Tianzhu and Dharma left one of two secret scriptures in Shaolin Temple, one is Washing the marrow and the other is Yijinjing. "Washing the marrow" is a classic of internal cultivation, which belongs to Hui Ke and has not been circulated in the world. Yijinjing is an external revision book, which has been preserved in Shaolin and has been passed down to this day.