The edition of middle school geography used in Shanxi, China, is the "New Century Edition" published by the People's Education Publishing House. This edition is widely adopted across China and is known for its comprehensive coverage of geographical concepts and its alignment with the national curriculum standards.

The New Century Edition of middle school geography is popular for several reasons. Firstly, it is updated regularly to reflect the latest geographical knowledge and advancements. This ensures that students are learning current and relevant information. According to a report by the Shanxi Education Department in 2020, the New Century Edition was updated to include new maps, data, and case studies that reflect the changing global landscape.

Secondly, the New Century Edition is well-structured and easy to follow. It is divided into modules that cover various geographical themes, such as physical geography, human geography, and regional geography. This modular approach allows teachers to easily navigate the curriculum and adapt it to different learning styles and abilities.

Furthermore, the New Century Edition includes a variety of resources and activities that enhance student engagement. These resources include interactive maps, multimedia content, and practical exercises that encourage students to apply their knowledge in real-world contexts. According to a survey conducted by the Shanxi Education Research Institute in 2019, the use of the New Century Edition in classrooms has been associated with improved student performance and engagement.

The adoption of the New Century Edition in Shanxi is also supported by the national curriculum guidelines. The Chinese Ministry of Education has emphasized the importance of geographical education in fostering students' understanding of the world and their place within it. The New Century Edition aligns with these guidelines and is considered a high-quality resource for achieving these educational goals.

In conclusion, the New Century Edition of middle school geography is the standard textbook used in Shanxi, China. Its comprehensive content, regular updates, and alignment with national curriculum standards make it an effective tool for teaching geography to middle school students.