Complex sentence: Bagua is a main concept in Chinese combinatoric philosophical thought: 8 emblematic figures of mythical origin and mystical significance that are specifically said to be related to the Yellow River Map and the Luoshu Square.
Split into simpler sentences: Bagua is a main concept in Chinese combinatoric philosophical thought: 8 emblematic figures of mystical origin and significance. These are specifically said to be related to the Yellow River Map and the Luoshu Square.