In Da Liu Ren the Monthly General is set by the palace the Sun occupies, with the medial solar terms marking when it changes. It sits alongside the divination hour, the void branches and Tai Sui as one of a chart's time coordinates, and one slip here throws the whole chart off.
A Da Liu Ren chart is built from elements such as Tai Sui, the divination hour, the monthly general and the void branches, and its core is the Four Lessons and the Three Transmissions. The Four Lessons are derived layer by layer from the upper and lower spirits, while the Three Transmissions fall into nine types according to the controlling and punishing relations between those lessons, known as the Nine Gates; read the structure first and the judgment afterwards.
