After Conquering Gaoyang, Li Er Secretly Came to Me to Buy Medicine

Protagonist: Fang Yiai [Shuangwen of the Tang Dynasty], [Medicine God System], [Open your mind] Li Shimin: I asked you to compete for poetry, but you actually sell medicine? Fang Yiai: This is the last one, does the emperor want it? Li Shimin: Get lost, I'm not sick... Fang Yiai: If you don't want to buy it, I won't buy it. I'll keep it for myself. Li Shimin: Wait! Leave some for me, the white tiger in the Royal Animal Park has not been feeling well recently... Fang Xuanling: Erlang, I want to ask you for a favor? Fang Yiai: Dad, what's wrong? Fang Xuanling: Do you still have that thing? Fang Yiai: Mom, is dad really weak? Lu: Son, prepare more for your father. Changsun Wuji: Nephew, I want to buy some medicine. Look... Fang Yiai: I've been lonely, empty and cold lately... Changsun Wuji: Dear son-in-law, when are you planning to propose marriage? Qin Qiong: Dear nephew, my uncle wants to have a baby. Do you have any idea? Fang Yiai: It's a small problem. One pill of this medicine every day will guarantee that you will have children until you grow old. Cheng Yaojin: My dear nephew, I've been a little unlucky recently. Is there anything you can do? Fang Yiai: If you take this lucky pill, you will be guaranteed good luck.