北.......................EBTT-38 (图)

Inside the five elements, representing the water with the north and fire with the south, and east and west on behalf of wood and gold, respectively. Water and fire have no form, how do them be held in a basket? But both gold and wood are a tangible thing, so comes the answer why we call the object by "the East and West", not called "the North and South".

Meanwhile, the south is the major direction for it is facing the sun, the Yang, a central axial is formed, so most shops are constructed to faced the south. Beside these, there are practical reasons. Traveling of merchants from south to north will be difficult in the ancient time because the asperity of north or by weather change. The direction of early travel will form the direction of streets in a city, the east-west street become the major street like the east and west Changan street. But in modern time in a metropolitan, this street direction for dongxi is no longer related, such as Wangfujing Street and the streets in Manhattan.

These tell us how the environment could shape the pattern of human's daily life, and how the mysterious theory is sometimes based on facts.