The doubtful Sun Li finally returned home. First he called the hospital and asked for half a day off. Then he carefully pulled out the mysterious pamphlet from his arms and looked at it intently.

"Isn't this just a set of radio exercises?"

Sun Li squinted at the worn pamphlet, but turned around a few pages at random. Sun Li began to mutter in his heart. He really thought that the old beggar was an immense man, but when he saw the pamphlet, Sun Li doubted the old beggar again.

Because the cover of this pamphlet is written with `Hualong recipe', which makes Sun Li very familiar. There are only...