PREVIEW
... al court can't afford it anymore. The consumption of food and fodder is too high. Shaanxi..." seems to understand a little What's the matter, Zheng Chongjian thought about it, "Do you think potatoes and sweet potatoes can be popularized in Shaanxi and Shaanxi Xingdusi, as well as in the three borders and four towns and guards?"
Zheng Chongjian knew that Feng Ziying had been promoting the planting of potatoes, and later there were sweet potatoes. It is said that these two crops are very ...
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