What is the biggest cosmic problem in cosmology? What is the biggest crisis in physics? Based on cosmological coincidences, we discovered and deciphered a Yin-Yang Universe Model that has been circulating for thousands of years, providing visual image evidence for the Einstein Spherical Universe Model that has been silent for a hundred years, and providing simple and elegant explanations for some key scientific problems that have long troubled cosmologists and physicists, such as the asymmetry of matter and antimatter, the cosmic puzzle of cosmic megastructures, making dark matter and dark energy visible, and deciphering the mystery of the Cosmological constant Λ. This discovery makes us believe in the return to the Einstein Spherical Universe Model is the correct option.