Which high school did Hainan Changjiang get 690 points in the senior high school entrance examination?

According to the information you provided, students who scored 690 points in the senior high school entrance examination in Changjiang, Hainan can choose to go to Haikou or Sanya to attend high school.

First of all, Haikou City and Sanya City are both economically developed cities in Hainan Province, with high-quality educational resources and many high-level middle schools. Haikou, as the capital city, has a mature middle school education and many famous schools, such as Haikou No.1 Middle School and Haikou Middle School. Sanya is a famous tourist city in Hainan Province, but its education is not inferior. Sanya No.1 Middle School and Sanya Middle School are excellent middle schools.

Secondly, you can choose high school according to your hobbies and career planning. If you are interested in science or engineering, you can choose the corresponding key middle schools, such as Haikou No.1 Middle School and Sanya Middle School. If you are interested in liberal arts, you can choose high schools that focus on literature, such as Haikou Foreign Language School and Sanya Yucai Middle School.

Finally, you can also choose according to the teaching quality of high school and the level of teachers. The teaching level of high school can be evaluated by the enrollment situation and students' achievements over the years. In addition, you can consult the local education department or parents to learn more about attending high school.

To sum up, if you get 690 points in Changjiang, Hainan, you can choose to attend high school in Haikou or Sanya. You can consider your hobbies and career planning, as well as the teaching quality and reputation of high school.