.Taking out a seedling, Li Chen turned to Su Jinping and said, "This thing is called sweet potato. Because it comes from a foreign land, it is also called sweet potato. One mu (a unit of area) yields...subject to strict confidentiality."Li Chen's words made Xu Wei waver for a moment.After all, when one enters the imperial service, no one doesn't want to bring glory to their ancestors.But this waveri...