idiom > metal and stone an expediential policy
Contents
Stone of the strategy
  Explanation: Described as gold, stone generally durable and stable strategy.
  Source: "Later Han Feng Yan Biography": "Yong Yong of the letter of it, breaking the stone of the policy."
No. 2
  发音 jīn shí zhī cè
  释义 形容如同金、石一般经久而稳定的策略。
  出处 《后汉书·冯衍传》:“故信庸庸之论,破金石之策。”