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Traveling back to Daqian, Zhao Ziheng sadly discovered that he owed ten thousand taels of silver, and if he couldn't pay back, he would be sent to the frontier! In order to make money, Zhao Ziheng had to come up with various small inventions and research, and the truth of the past gradually came to light... A few years later, Zhao Ziheng became the most carefree idler in Daqian. Princesses lined up to date him, princes and nobles rushed to curry favor with him, and the emperor was disobedient? Then scrap it and replace it with another one!