This book is a heterogeneous mass of information, being three parts history and seven parts science.

Heterogeneous color show the Yuanqi is still in chaos;

I did not realize how motley are the qualities that go to make up a human being.

The light color of heterogeneous impurities, volatile, long look will make people feel dizzy spin.

Since the source of materials is extensive, it is a necessity to discern where these materials come from.