The School of Yin-Yang is a philosophical and cosmological system that originated in ancient China and has had a significant influence on Chinese culture and thought. It is based on the concept of yin and yang, which are complementary and interconnected forces that exist in all things. These two forces are seen as the fundamental building blocks of the universe and are believed to be in a constant state of balance and harmony.

The main principles of the School of Yin-Yang are rooted in the idea of duality and the understanding that everything in the universe is made up of two opposing yet complementary forces. These forces are yin and yang, and they are represented by the familiar black and white symbol.

The first principle of the School of Yin-Yang is the concept of duality. This principle recognizes that everything in the universe is made up of two opposing forces, yin and yang, which are constantly interacting and influencing each other. This duality is seen as the fundamental nature of the universe and is believed to be the source of all things.

The second principle is the idea of balance and harmony. According to the School of Yin-Yang, the universe is in a constant state of balance and harmony, with yin and yang working together to maintain this equilibrium. This balance is seen as essential for the smooth functioning of the universe and is believed to be necessary for the well-being of all living beings.

The third principle is the concept of change and transformation. The School of Yin-Yang recognizes that nothing in the universe is static, and everything is constantly changing and transforming. This change is seen as a natural and necessary part of the universe, and it is believed to be driven by the interplay of yin and yang.

The fourth principle is the idea of interdependence. According to the School of Yin-Yang, everything in the universe is interconnected and interdependent. This means that all things are influenced by each other and cannot exist in isolation. This principle emphasizes the interconnectedness of all things and the need for balance and harmony in all relationships.

The fifth principle is the understanding that yin and yang are not absolute, but rather relative to each other. This means that something can be considered yin or yang depending on its relationship to something else. For example, light can be seen as yang in comparison to darkness, but it can also be seen as yin in comparison to the sun.

In conclusion, the School of Yin-Yang is based on the principles of duality, balance and harmony, change and transformation, interdependence, and relativity. These principles form the foundation of this cosmological and metaphysical system, providing a framework for understanding the universe and our place within it.