The two juggling schools of Yin and Yang inside and outside Shanhaiguan started a juggling duel because of a "Book of Fortune" that was rumored to be able to change fate against the sky. The two juggling schools of Yin and Yang inside and outside Shanhaiguan started a juggling duel because of a "Book of Fortune" that was rumored to be able to change fate against the sky. The two juggling schools of Yin and Yang inside and outside Shanhaiguan started a juggling duel because of a "Book of Fortune" that was rumored to be able to change fate against the sky. The two juggling schools of Yin and Yang inside and outside Shanhaiguan started a juggling duel because of a "Book of Fortune" that was rumored to be able to change fate against the sky.