The bagua (Chinese: 八卦; literally: eight symbols) are eight trigrams used in daoist cosmology to represent the fundamental principles of reality, seen as a range of eight interrelated concepts. Each consists of three lines, each line either broken or unbroken, representing yin or yang, respectively.n Xiantian Bagua, also known as Fu Xi Bagua or Earlier Heaven Bagua, the Heaven is in the higher part and the Earth is in the lower part. The trigram Qian (Heaven) is at the top, the trigram Kun (Earth) is at the bottom (in the past, the South was located at the top in Chinese maps).