[Yangzi Evening News] I often hear frogs selling in the food market or on the roadside. Seeing the bloody frog skin, my heart ached and I vomited on the spot. I've always wondered that everyone knows that frogs are beneficial insects, and there are so many advertisements saying that frogs should be protected. People's Republic of China (PRC) Wildlife Protection Law also includes the protection of frogs, but why do so many people catch and buy frogs?

Frog is an expert in insect catching: a frog can prey on 500,000-400,000 moths a year, and it is also the bane of pests such as rice planthoppers, flies and mosquitoes. Think about it. If people catch a frog, how many pests will escape in a year? This is the truth that "catch a frog in spring and lack a load of food in autumn". And if you raise 100 ancient frogs in a field, the effect is much better than pesticide application. If pesticides are used, crops will be seriously polluted, people will be poisoned and sick after eating them, and even lead to death in serious cases. This shows the importance of frogs to human beings and crops. If frogs are not protected, pests will occur, rice planthoppers will multiply rapidly and crops will fail.

Frogs are also singers: frogs can bring fun to people no matter day or night. Frogs barking together, just like a chorus, is a wonderful symphony.

Now people kill and buy frogs for a little delicacy, which makes the number of frogs less and less and the number of pests more and more. People should reflect on it.

Let's protect the frog, the "ground pest control expert"!

Qian Weizhou, Class 3 of Langya Road Primary School in Nanjing

Comments: The author observes the society from the perspective of children and illustrates the benefits of frogs through examples, thus telling people to protect frogs. The full text is clear in thinking, substantial in content, fluent in language, and uses a variety of sentence patterns and idioms, which can be called a masterpiece.