Living on borrowed money isn't a sustainable plan.
Tips
history
Rooted in 《战国策·赵策》: 「岂非计久长，有子孙相继为王也哉」 — Queen Dowager Zhao weighing 'a plan that lasts long' for her dynasty. Reinforced in 《汉书·元帝纪》: 「非长久之计」 — rejecting short-term fixes as not sustainable.
usage
Almost always in the negation 不是长久之计 ('not a long-term solution') — used to argue against a quick fix. The positive form 作为长久之计 appears in formal writing.
