Originally an order by the First Emperor of Qin to expel foreign officials; now used to describe any words or behavior intended to signal that a guest should leave. It is often used with the verb [[下|下|xia4]].

to show a guest the door; to ask a visitor or unwelcome guest to leave; to give a tenant notice to leave

A famous historical essay by the Qin official [[李斯|李斯|li3 si1]] submitted to the First Emperor; it successfully argued that expelling foreign scholars and advisors would harm the state's power and ambitions.