Although the "law of the jungle" has been universally spurned by people all over the world, there is still a long way to go before international politics can bid farewell to barbarism completely. Although economic development contributes to the improvement of comprehensive national strength, economic security needs reliable support from military forces. It's hard to imagine, without the support of military power, what the maritime trade would be like; It is hard to imagine what history would be like if DaSong had a firm martial spirit and strong economic and scientific strength.