Which one is more suitable for senior high school students, Nanjing or Chengdu?

Nanjing is more suitable.

As an important capital city in ancient China, Nanjing has many historical and cultural attractions, such as Confucius Temple, Sun Yat-sen Mausoleum, Presidential Palace, etc., which are very attractive to students who like history and culture. There are many natural scenic spots around Chengdu, such as Dujiangyan, Qingcheng Mountain, etc., where you can enjoy the natural beauty.

Nanjing has many famous universities, such as Nanjing University, Southeast University, etc. There is a strong academic atmosphere and youth culture here. Students can feel the atmosphere of a university campus. The academic atmosphere in Chengdu is slightly weaker. Therefore, Nanjing is more suitable for high school students to visit.