First of all, high school students' language is not enough for them to have academic exchanges overseas, and they can only have some simple exchanges, which will greatly trouble their self-care in life, and it is difficult for teachers to keep up with the progress in teaching in foreign languages.

Then, high school students' psychology is not mature enough, and they are easily led astray. A lonely high school student who is away from home, without the correct guidance of his family and the yardstick for judging right and wrong, can easily go astray.

Finally, the landlord cited some examples to strengthen the argument.