With the bell ringing after class, Class 2 (4) of Shuizawa Junior High School suddenly became noisy. The "clapping" sound of sorting out books instantly came out with the rubbing of chairs with cement floors and the "squeaking" sound of moving desks.

"Han Zi, I'll go fishing with Ai Yan, Xiao Miao and Kaka later, will you go or not?" Wei Guangxing asked.

Han Zi's surname is Lu Mohan. He is not very tall. He is less than one meter and sixty-five years old. He looks like a slightly black and thin peasant boy, a Lujia villager. Wei Guangxing is a native of Weihe Village. He has a national face. He is tall and big horse. His skin is dark. He looks very strong. Both of them are students of Class 2 (4) of Shuizhe Junior Middle School.

Han Zi laughed and said, "No, my mother told me to go back to school earlier and help my grandpa collect Chinese herbal medicine. Go and have fun."

Wei Guangxing made a faint appearance: "Sweat, cold son, you are really twenty-four filial descendants. Ignore you, we go fishing. There are many fish in the Chenchi Reservoir. After fishing, we can enjoy a feast of fish again. Slip, think of it, drool, cold son, hang your appetite, who call you have no appetite.

"Cut, you'll blow, don't be caught by the reservoir people, or you can't let Mr. Yan go to the police station to lead people out tomorrow, I think you still want to think about the fish feast? It's the mosquito brothers in the police station who have a big collective meal, right? The cold son joked.

Wei Guangxing said, "Shut up your crow's mouth. At that time, the people in the reservoir were eating. Who would go to see the reservoir? Don't tell you, go first." Then he rushed out of the classroom.

Hanzi shook his head and said to himself, "Cut, fishing, that's a boring thing to kill time. Laozi went back to see Grandpa's medical book. There were many strange things in it, which you boys had never heard before. That's the funny thing."

Hanzi's home is just across the middle of Shuizhe Junior High School, crossing an asphalt road about six meters wide and less than five hundred meters ahead.

Han Zi's grandfather, Lu Lingyi, is an old Chinese medicine doctor who runs a Chinese medicine clinic. In the lobby on the first floor of their house, a sign is erected at the door, on which the six characters of Lingyi Traditional Chinese Medicine Clinic are written in black and white letters.

It was only a few minutes'walk from Shuizhe Junior High School to Hanzi's home. When Hanzi reached the door, he heard the hoarse opera singing of Empty City Plan. Entering the door, I saw no patient in the clinic. Grandpa was lying leisurely in a Taishi chair, holding a copy of "Compendium of Materia Medica" and looking through it. Next to it was an old-fashioned radio. The hoarse voice just heard outside the door came from the radio.

"Grandpa, I'm back." Entering the door, Hanzi greeted Grandpa, put down some textbooks in his hand, squatted beside him and asked, "Grandpa, how many patients did you see today?"

The old man raised his head and laughed, "Ordinary mind, ordinary mind, nature is the blessing."

"No, Grandpa, you don't have any patients today. Grandpa used to have zero duck eggs." Hanzi said jokingly.

Han Zi and his grandfather are most able to talk. Although the age difference is sixty years, it is a whole Jiazi, but there is no generation gap between them. Usually there is nothing to talk about. It is common for grandparents to make jokes between them. Maybe it's because they share a common hobby - both of them are interested in Chinese medicine books. At home, the two grandsons were nicknamed "one old, one young and two Chinese medicine nerds" by his father Lu Yunlin.

Hanzi's grandfather is seventy-five years old this year, but his hair is only half white, his face wrinkles are few, his face is very ruddy, and he has no presbyopia, which is very rare among the old people at that time. At this time, I saw my grandson laughing at himself and said, "Duck eggs are good. Apart from being rich in nutrition, they do not belong to sunny food. They are delicious and nourishing. What's wrong with them?"

Han Zi laughed and said, "Grandpa, you are also very humorous. Grandpa, talk to you about something.

Glancing at his grandson, the old man said with a laugh, "When you discuss something, your little boy will know what fart you want to fart as soon as he slaps his grandfather's butt, and then come and slap Grandpa's box of ancient books, right?"

Han Zi grinned and said, "Grandpa, when did you become a worm?" He looked up and down at his grandfather, who looked like an old naughty boy, with a strange smile on his face.

The old man was stunned: "What has become a worm? Does Grandpa look like a worm?

Hanzi smiled sly and said, "If it weren't for worms, how would you know what I was thinking in my stomach, Grandpa?"

The old man suddenly realized it and scolded, "Good boy, you compared Grandpa to Ascaris. It's really yours. Even Grandpa's so shrewd people follow your example." After that, they looked at each other and laughed.

After laughing, Hanzi asked seriously, "Grandpa, tell you seriously, do you remember what you said to me on my tenth birthday?"

The old man thought and said, "When you were ten years old? What did I say to you? Grandpa's old and his brain is not working well."

Hanzi said, "How did you tell me that I wanted to read the ancient medical books in your treasure box that year? You said,'It's not time yet. When you're past childhood, Grandpa will show you. Do you remember this sentence Grandpa?

The old man thought about it again and said, "It seems to me that