There Is Xuanwu in the North and Suzaku in the South.

Turn things upside down, regardless of north or south. Back then, Mr. Yu gave the four children in his family names with the meaning of "East, West, South, North". He accidentally confused the directions of "East, West, South, North" and then reversed East and West, regardless of North and South. One day, Bei's father, the only son of the Yu family, brought back a woman and her two sons... The father's debt must be paid by the son? No matter what you pay for, he is also my father.