What major do you want to be a lawyer in the future and volunteer to fill in? Is it law or law? What's the difference between them?

Accurately speaking, law is a major, that is, the major of law, which includes many disciplines and can also be said to be the direction (I think this is what you want to ask), including civil law, civil procedure law, criminal law, criminal procedure law, administrative law and administrative procedure law, economic law, commercial law, public international law, international economic law, private international law and theoretical law (constitutional law, jurisprudence, legal history, legal professional ethics) and so on.