In the thesis writing of foreign students, the thesis statement is a general statement of the core idea or theme of your whole article. It should clearly express your position or proposition and guide the development of the whole article. Here are some instructions on how to write a thesis statement:

1, express your views clearly: the paper statement should directly and clearly express your views or arguments. It should answer the central question of the article and provide a clear position.

2. Concise: The paper statement should be concise and clear, and generally only contains one or two sentences. Avoid using too complicated or obscure language so that readers can understand your ideas quickly.

3. Concreteness is controversial: the thesis statement should be specific and controversial. Avoid using too general or generally accepted views, but put forward a specific proposition, which can arouse readers' interest and thinking.

4. Guide the structure of the article: The thesis statement should be able to guide the structure and development of the whole article. In the process of writing, make sure that every paragraph and argument is related to the thesis statement and helps to support your point of view.

5. Proveability: The viewpoints put forward in the thesis statement should be provable. In your article, you need to provide evidence, examples or logical reasoning to support your point of view.

6. Reflection and revision: Once you have written your thesis statement, you need to constantly reflect and revise it to ensure that it is accurate, clear and can effectively summarize the theme of your thesis.

Here is an example to illustrate the writing of the thesis statement:

Original question: What is the impact of climate change on global food security?

Incomplete thesis statement: Climate change has a negative impact on global food security.

The complete thesis states that climate change poses a major threat to global food security through its impact on crop yield, water supply and extreme weather events, and urgent action is needed to mitigate its consequences.

In this example, the complete paper statement clearly states the impact of climate change on global food security, and provides key elements such as crop yield, water resources and extreme weather events. The statement also mentioned the need for urgent action to mitigate the consequences of climate change.