Liu Shih-chi, a researcher in the Sun Yat-sen Institute for Social Sciences and Philosophy at the Academia Sinica, notes: "Leaving empty space on which crops could be cultivated had two functions: preparation for long-term defense and allowing for additional growth." This suggests an understanding of the concept of "managed growth."
「城中留有空地耕種，具有持久性的防禦備戰與城市發展雙重功能」，中央研究院社會科學研究所研究員劉石吉認為，這樣的做法具有「成長管理」觀念。