Architecture thumb|upright=1.2|Dujiangyan, an irrigation project on the Min River near Chengdu, completed by the state of Qin in 256 BC. Though a reinforced concrete weir has replaced Li Bing's original weighted bamboo baskets, the general infrastructural layout is still used to irrigate over of land. Warring States–era architecture had several definitive aspects. City walls, used for defence, were made longer, and indeed several secondary walls were also sometimes built to separate the different districts. Versatility in federal structures was emphasised, to create a sense of authority and absolute power. Architectural elements such as high towers, pillar gates, terraces, and high buildings amply conveyed this.
Architecture thumb|upright=1.2|Dujiangyan, an irrigation project on the Min River near Chengdu, completed by the state of Qin in 256 BC. Though a reinforced concrete weir has replaced Li Bing's original weighted bamboo baskets, the general infrastructural layout is still used to irrigate over of land. Warring States–era architecture had several definitive aspects. City walls used for defence, were made longer, and indeed several secondary walls were also sometimes built to separate the different districts. Versatility in federal structures was emphasised, to create a sense of authority and absolute power. Architectural elements such as high towers, pillar gates, terraces, and high buildings amply conveyed this.