YAN X.

I hold a Ph.D. in Chemistry and have more than 30 years of experience teaching chemistry and conducting scientific research at the university level. Throughout my career, I have taught a wide range of chemistry courses in both classroom and one-on-one settings while mentoring students with diverse academic backgrounds. In addition to teaching, I have published more than one hundred peer-reviewed research papers in chemistry, giving me a deep understanding of both fundamental principles and advan…