>Du Heng traveled to Chang'an in the late Tang Dynasty and became a minor official in Wannian County.
>On a rainy night, he improved the flood control documents, but was framed for the sluice murder case.
>To prove his innocence, he reproduced the traces of water flow on the spot, but was recognized by Prime Minister Pei Du's keen eye.
>When he used "work-for-relief" to control the locust plague, he offended the powerful but subjugated the homeless and beggars.
>Improved looms triggered a Persian commercial war, and undercurrents surged in Chang'an West City.
>He didn't know that the beggar he adopted was an orphan from Anxi, nor did he know that the Sitiantai supervisor was watching Ziwei's unusual movements at night.
>When the Tibetan mission brought the princess to marry, Du Heng set up the first biogas lamp on Zhuque Street.
>The moment the lights were turned on, the bronze instrument of the Sitiantai shattered, and Concubine Wu Hui's scream came from deep in the palace——
> "The 'Ying Huo Shou Xin' prophesied thirty years ago has come true!"
---
