大兴土木（大興土木）　

◎ 大兴土木 dàxīng-tǔmù

[go in for large-scale construction;be busy at putting up installation;build many new buildings] 大事兴建,土木工程很大

却好庄间狄员外大兴土木,创起两座三起高楼。——《醒世姻缘传》