The PhD in Environmental Engineering at Chang'an University (CHD) is an advanced academic program designed for international students passionate about solving pressing environmental challenges. Conducted entirely in English, this program provides an inclusive platform for students from diverse backgrounds to engage in meaningful research about sustainable engineering practices and environmental protection. Over several years of study, students will explore critical areas in environmental engineering, including water and air quality management, waste treatment technologies, and sustainable resource usage. Topics such as environmental impact assessments, climate change mitigation strategies, and the development of clean technologies are integral to the curriculum, combining theoretical knowledge with practical applications. The program emphasizes mentorship, offering students guidance from distinguished faculty members who are experts in various subfields of environmental engineering. Engaging in hands-on projects, students will participate in essential fieldwork that allows them to apply their knowledge in real-world contexts. This experience is vital in preparing them for careers in academia, industry, or as consultants in environmental policy and management. Situated in Xi'an, a city rich in history and culture, students thrive in a vibrant environment that fosters personal growth and interdisciplinary collaboration. Graduates emerge as leaders ready to tackle environmental challenges globally.