A chapter of doctoral thesis can be distributed in English. When writing academic papers, you can use English as chapters, especially in some scientific research fields or fields involving international academic exchanges. Many academic papers will contain chapters or parts in English, such as introduction, literature review, and discussion of results. However, whether to use English content depends on your specific academic field, thesis topic and target audience. Your doctoral thesis is aimed at international academic circles, or involves the content that needs to be communicated with international scholars, so it is a very reasonable choice to use English as a chapter. When writing English content, we should try our best to ensure accurate grammar, appropriate words and clear and smooth expression. In addition, we should also pay attention to English format and academic writing norms, including quotation format and citation of references. The most important thing is to keep consistency when writing a paper, even if English content is used, it should be coordinated with the style and language style of the whole paper. In a word, it is common to use English as a chapter of doctoral thesis, but the final decision on whether to use English depends on your research field, target readers and academic needs.