Complex sentence: The magical significance of this location would assure a long dynasty like the Zhou whom the Han sought to emulate; however, the practical strategic military value of a capital located in the Wei Valley became the deciding factor for locating the new capital.
Split into simpler sentences: The magical significance of this location was believed to ensure a long-lasting dynasty like the Zhou, whom the Han sought to emulate. However, in practice the strategic military value of a capital located in the Wei Valley became the deciding factor for locating the new capital.