Carts share one gauge, writing one script.
車同軌,書同文。

Politicians
Qin Shi Huang
First emperor of China (259-210 BC). In 221 BC he unified the warring states, invented the title huangdi, and standardised script, weights, and currency. Builder of the first Great Wall; reviled for book-burning.
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Source: 礼記 中庸 第28章 (秦による全国規格統一を後世に伝える表現)Verified