Ying thought her son was going to take Yan Yan on an overseas trip, and she was both happy and kept nagging him with a bunch of instructions.How can I take good care of my younger sister"Okay, I reme...a big discovery!""I suddenly remembered that ancient medical book you showed me when I was a child. It mentioned a medicine called Chuanxin Wu, which could inhibit the growth of toxins.""That's right,...