Utility values, whether immediate or long-term, are highlighted in the relative relationship between man and fish. However, when the obvious utilitarian relationship between man and fish is temporarily erased, when candidates expect fish to be fully developed as a person, as an academic metaphor or even as a dream metaphor, people who were originally opposed to fish become synonymous with society. "Open the mesh and let the academic grow" is like this, calling for academic masters. Bai Xianyong, who is obsessed with Kunqu art, wrote "There is a Beauty Waiting", and so did "Cameron's Wisdom", which has been written for ten years. Of course, there are more articles such as "Give yourself a loose ruler to grow up", which are all from the personal feelings of candidates. In recent years, the composition of college entrance examination pays great attention to examining students' critical thinking ability. The tension between "us" and "them" implied in the proposition composition "They" in 2008, and the dialectical understanding of inheritance and innovation, local and whole, positive and unfamiliar in the material composition about Banqiao style in 2009 are all permeated with a critical thinking force. Similarly, there are dialectical relations between "short-term interests" and "long-term interests", "human development" and "ecological balance" from a seemingly simple operation behavior of people towards natural fish and turtles. Well-known issues such as "sustainable development", "Scientific Outlook on Development" and "respecting the development law of things" are also the proper meanings of the material itself. It should also be noted that many candidates' thinking patterns cannot get rid of the shackles of machinery and develop a dialectical thinking that fully digs the depth of materials. The reason why they are mechanical is that they often passively accept the ideas and opinions provided by the surface of materials, but can't actively use the light of human wisdom to illuminate hidden and even contradictory places in materials. They spread their views by abandoning contradictions rather than sublating them. In this way, most students' compositions are correct in orientation and unbiased in conception, but the profundity and speculative nature of the articles are not fully reflected. On the contrary, some candidates can find their own way and write extraordinary articles with the help of a speculative force, such as "Danish, how is your fish?" In an article, the seemingly environmentally friendly behavior of Danes was subverted by the theoretical principles of evolution and was considered to have led to the degradation of species. Because catching the big and letting the small is probably to protect the stunted young fish, as a result, the big fish are becoming more and more scarce, and even lead to extinction. Although it is doubtful whether such a theory can be universally applied to nature, students can question the rationality of the material point of view, and their theoretical courage of speculation is commendable. However, it is the indispensable speculative nature that urges us to think further. Does this suspicion unconsciously echo social Darwinism, and only confirms the cruel competition in the jungle? Whether thinking is mechanical or dialectical is not only reflected in students' conception of the article, but also in their understanding and choice of style. Most college entrance examination compositions are not limited to style, and their purpose is to hope that students can be liberated from the shackles of style when they conceive. However, under the guidance of mechanical thinking and inappropriate ideas, there are many people who think that the narrative is superficial and the argument is profound, so that writing argumentative essays is the only way for students to pursue speculation and profundity. It is just a specious view that only discussion can provide the possibility for profound or speculative thinking. As we all know, thinking in images can also be profound, and it is not uncommon to use abstract thinking to present empty and shallow articles. Otherwise, just like Tolstoy, from A Landlord's Morning to War and Peace and Anna karenin, he had a profound understanding of human nature and society, and won the reputation of "psychological dialectics" with the help of the ideological profundity contained in the image. Similarly, for Lu Xun, who can say that his novels are not as profound as argumentative essays? In fact, the good unity of image and ideology can also be seen in the titles of some candidates' articles this time, such as "the scenery is long and eye-catching", such as "Don't let reeds repair it to hinder the birth of the moon". Unfortunately, due to the mechanical way of thinking, the college entrance examination composition has lifted the restrictions on style and has not allowed candidates to let go of their hands and feet. Dealing with this material from the perspective of argumentative writing still accounts for the vast majority. In contrast, those individual chapters that can incorporate more narrative elements into the article and handle them properly stand out and get favorable comments. For example, an article entitled "Now? Long term? The composition of ""intercepts four pictures in life, highlights the theme in the comparison before and after, and has a unique style. The change of thinking mode from mechanical to dialectical is not only reflected in the correct understanding of the complex relationship between profound theme and stylistic application, but also in the choice of words and sentences and the profound analysis of words and concepts. For example, the article "Waiting Machine" quoted Buffett's words to distinguish between "investment" and "speculation", which not only gained a certain speculative ability of the article, but also revealed the ideological tentacles of thinking about reality with materials. But the most wonderful thing is "leave a corner to breathe", which has amazing power from the beginning: "It sounds like a fairy tale, and the Danes actually measure the size of fish with a ruler; It sounds like a lie. Fishing without fine nets will bring more fish. Sounds like a joke. Leave a corner for air. "When he throws out the words" fairy tale ","lie "and" joke ",the tension between the differences of words and the asymmetry between the surface feeling (so-called" voice ") and the essence of words, behind this tension and asymmetry, there is a wise eye and keen thinking power. The above model essay provides students with methods on how to write a good composition, especially how to cultivate dialectical thinking, which is worth learning and thinking deeply. At the same time, other universal problems exposed by many disadvantages are also worthy of students' and instructors' vigilance. In particular, a considerable number of students lack the ability to analyze materials. No matter what the proposer provides or what the examinee adds, it is impossible to grasp the characteristics of the specific materials themselves and to distinguish the differences between different materials. In their compositions, they only use one or two general concepts and mechanical ways of thinking to apply all the materials, which leads to a serious disconnect between opinions and arguments. It is equally important for middle school students to see the shortcomings of others' compositions, find their own shortcomings and make up for them in training. Related links 20 10 Shanghai college entrance examination composition topic According to the following materials, choose an angle, do your own topic, and write an article of not less than 800 words (don't write poetry). Danes take a ruler with them when they go fishing. When they catch fish, they often measure them with a ruler and put small fish that are not big enough back into the river. They said, "Isn't it better to let the little fish grow up?" More than 2,000 years ago, Mencius of China once said, "You can't eat if you count." It means, don't catch small fish in the pond with a fine net, so there will be more fish. Professor Shan, School of Humanities and Communication, Shanghai Normal University