<P> Warring States - era architecture had several definitive aspects . City walls, used for defense, were made longer, and indeed several secondary walls were also sometimes built to separate the different districts . Versatility in federal structures was emphasized, to create a sense of authority and absolute power . Architectural elements such as high towers, pillar gates, terraces, and high buildings amply conveyed this . </P> <P> The written language of the Qin was logographic, as that of the Zhou had been . As one of his most influential achievements in life, prime minister Li Si standardized the writing system to be of uniform size and shape across the whole country . This would have a unification effect on the Chinese culture for thousands of years . He is also credited with creating the "lesser - seal" (Chinese: 小篆, Pinyin: xiǎozhuàn) style of calligraphy, which serves as a basis for modern Chinese and is still used in cards, posters, and advertising . </P> <P> During the Warring States period, the Hundred Schools of Thought comprised many different philosophies proposed by Chinese scholars . In 221 BC, however, the First Emperor conquered all of the states and governed with a single philosophy, Legalism . At least one school of thought, Mohism, was eradicated, though the reason is not known . Despite the Qin's state ideology and Mohism being similar in certain regards, it is possible that Mohists were sought and killed by the state's armies due to paramilitary activities . </P> <P> Confucius's school of thought, called Confucianism, was also influential during the Warring States period, as well as throughout much of the later Zhou dynasty and early imperial periods . This school of thought had a so - called Confucian canon of literature, known as the "six classics": the Odes, Documents, Ritual, Music, Spring and Autumn Annals, and Changes, which embodied Chinese literature at the time . </P>

Which philosophical school did the qin promote as its state ideology