1, Environmental Protection and Sustainable Development: This topic involves how to protect the environment, promote sustainable development and implement environmental protection technologies. The purpose of this theme is to educate students to pay attention to environmental protection and make contributions to the future sustainable development.

2. Information technology and data analysis: This topic involves computer science, information technology, data processing and network security. The purpose of this topic is to improve students' computer technology and data processing ability to meet the challenges of today's information age.

3. Internationalization and cross-cultural communication: This theme involves international communication, cultural differences and cross-cultural communication. This theme aims at educating students to understand the differences between different countries and cultures, and further promoting globalization and cross-cultural communication.

4. Healthy and Happy Life: This theme involves all aspects related to health, such as physical exercise, healthy diet, mental health and happy life. This theme aims to educate students how to maintain a healthy and happy lifestyle and improve their quality of life.

Elective compulsory courses are compulsory courses that students can choose to expand their knowledge, improve their skills and develop themselves.

The following are the precautions for taking compulsory courses:

1. Know the requirements and contents of the course: Before taking the required courses, know the requirements and contents of the course. Knowing this information can help you ensure that the learning objectives of the course meet your personal interests.

2. Plan the timetable: Taking compulsory courses will bring extra pressure to students' course burden, so plan the timetable and leave enough time for each course to study and complete homework.

3. establish contact: establishing contact with classmates and teachers is the key to elective compulsory courses. This will help you better understand the course content and get support and advice.

4. Practical application: Electing compulsory courses is usually based on practice and oriented to solving practical problems, so try to apply what you have learned to real life.

5. Active participation: It is very important to actively participate in elective compulsory courses. This may include participating in class discussions, demonstrations, teamwork and practical projects.

In a word, taking compulsory courses can provide rich learning opportunities and the possibility of expanding knowledge fields. Therefore, in elective compulsory courses, we should understand the course requirements, plan the timetable, establish contacts, practice and actively participate. This will help to get the maximum benefit and learning experience from this course.