Which prawn can turn it for me?

There used to be a candidate who went to Beijing for an exam. One night, he suddenly had three strange dreams. One is to grow vegetables on the wall, the other is to wear hemp fiber and an umbrella, and the third is to wear hemp fiber and an umbrella. So he went to the fortune teller and said, forget it, you'd better go home! You see, growing vegetables on the wall is fruitless, and it is unnecessary to wear hemp fiber and umbrella. Sleeping with your back to the person you like means you have no chance! So he went back to the inn to pack his bags and planned to give up the exam, but the boss was surprised when he saw it and asked him what was going on. He told the boss this and that, and the boss said with a smile, look! Growing vegetables on the wall is a high school! Wearing hemp fiber and umbrella is a preventive measure! Wearing hemp fiber and an umbrella means it's time for you to turn over! Candidates were overjoyed, so they carefully reviewed and prepared for the exam, and finally won the Flower Detective (the third place in the country). So, dreams are false, and you can make them come true. But more importantly, in real life, you struggle for your goals and blindly believe in your dreams or life, which is ultimately futile.

Please accept it, thank you!