ly wait until Yanyan's birthday and prepare a big surprise for her then.""When the time comes, we have to plan well..." Li Yuanfu felt that his son's surprise today had surpassed him. He had to think...researched medicine mixed together, try it out, and see if it helps the old lady's condition.""Oh." Ou Yan listened to him finish, saying lightly, "That thing is useless to the old lady.""Why" Mark as...