Four benefits and three yuan change with age every year, such as putting your feet in the child position, the sun in the ugly position, the mulberry door in the shade position, the moon in the base position, the official position in the morning position, the symbol of death in the fourth position, the year-end rest at noon position, the dragon absent, the white tiger in the application position, the blessing in the unitary position, the clothes rack in the application position, and the symbol of illness in the sea position.
Because the sun, the lunar calendar, Longde and Fude are auspicious, the four gods are called "four benefits". "Ternary" probably means an endless cycle according to the upper, middle and lower ternary cycle.
Sun, Taiyin, Longde and Fude are auspicious, while others such as Tai Sui, Sangmen, Zhengguan, Dead Elephant, Broken Year, White Tiger, Clothes Hanger and Sick Elephant are all fierce.
Four auspicious gods: the sun, the ugly year, the ugly year in the shade; 4 Taiyin, the child year is in the old age, and the ugly year is in Chen; 8 Longde, the child is not yet, and the ugly year is in Shen; 10 Ford, the child year is in unitary, and the ugly year is in Xu. These four are auspicious gods, so they are called Li Si.