Source: Science and Technology Daily Zhang Heng is a famous writer and scientist in China's Eastern Han Dynasty, his deeds of inventing the ground motion instrument, not only recorded in the history books, but also included in the textbooks.
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Original text: So the measuring path rotation examination is vast through the city of The Camp Guo Gao to take the special judgment in the Eight Capitals Qidu in the past is the Qin system across the Zhou Law Narrow Hundred Blockage Side ugly increase nine feasts of the coercion of the Purple Palace in Weiyang Table Que Que Yu Que Que ...
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