Construction
Pick a lucky hourDo matches: Renovate, Break Ground, Lay a Foundation
Lucky 28-mansion day
Black Path day
Malefics to avoid: Great Hour, Great Defeat, Xianchi Pool, Nine Pits, Nine Scorches, Departing Doom, Five Partings, Dark Warrior
Clash: Clash Mao E
Groundbreaking avoids clashes with owner and tai-sui direction; combine site orientation.