Changed on the 24th

Wei Zhen and Li Ginseng are all researching protective vaccines against infectious diseases, there are several, it took them a day to find materials, another day to process materials, and the rest of the time is to cultivate, and it will take several days.

Of course, on the first day, they made an insecticide, condensed into a very poisonous kind, a drop can be mixed with a large tank of water, and a tank of water can spray several acres of land.

And this insecticide, they make

"Peasant Girl: Interstellar Wars Will Drive a Tailwind Express in Ancient Times" Chapter 289 Earth Spirit Bead is hitting in your hand, please wait a moment,

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