The tuition fees of each major are different, and they are paid at their own expense. If you don't know what major you want, you can check it out in official website and Harvard. There is basically no opportunity for publicly funded undergraduate courses. Let's calculate it according to the current exchange rate of 65438 USD +0 =6.7987 RMB.
Two questions just show that Harvard needs excellent students with all-round development, and your understanding is somewhat narrow. Your place is just a county. It seems that there is no public welfare without nursing homes. I was in the United States during the Wenchuan earthquake, and some middle school students (not overseas Chinese) were collecting money for our disaster area.
TOEFL is a must, and Harvard seems to be considering IELTS now. There is no other way. Of course, graduate students are no exception. TOEFL is a must, and you have to take GRE, GMAT, LSAT and so on according to your chosen major.
I haven't heard that American students are not allowed to work outside school.
It takes more than money to go to Harvard University. Harvard is not a university that relies on student tuition, but a university that relies on graduate feedback. So he is very strict about the choice of students. I don't know what kind of mentality you have to go to Harvard to ask such a question. I hope four or five years is enough time for you to think clearly. If you don't know the truth of the feedback, I don't think you can even pass the visa.
I hope my answer is helpful to you.
Work hard and win glory for our country. Come on ↖ (ω) ↗