Lai Yin Palace （来因宫） is an important concept for flying star zwds. It’s the launch palace for Life Si-Hua.
For example, when you look at one zwds chart and the Life Si-Hua is “Lian-Zhen Hua Lu, Po-Jun Hua Quan, Wu-Qu Hua Ke and Tai-Yang Hua Ji”, then the location of the heavenly stem “Jia” （天干“甲”）will be the “Lai Yin” palace.
Sometimes you will find two “Lai Yin” Palaces in one chart. In this case, pay more attention to the earthly branch of “Yin”（地支宫位“寅”）.