What should I learn from looking at the vertical signs in the sky, Feng Shui, Qi Men, or stargazing and external responses?

Celestial science covers Feng Shui, Qi Men, stargazing, external responses and other disciplines. The two more commonly used ones are Feng Shui and Qi Men. Feng Shui is an ancient Chinese culture that involves the metaphysics of directions, Tai Gua Yin and Yang, Yin and Yang contracts, and formations and five elements. Qimen is a theory that combines the Bagua divine mathematics with the Five Elements Yin and Yang theory. Its knowledge mainly focuses on the Bagua spiritual numbers. Based on the Nine Palaces Bagua and the Tai Chi diagram relationship, it can deduce the numbers with specific meanings.