First, the meaning is different.
1, someone: someone, someone important.
2. Anyone: Anyone, anyone.
Second, the usage is different.
1, someone: Chinese means "someone". It can be used as a noun and pronoun in English. Someone is equivalent to the third person, so it is followed by a singular verb.
2. Anyone: Anyone means "anyone", not "any one", and any one means "any one", but sometimes it also means "anyone". It's not common to say that now. No one can use one or one's at the same time, such as If? Is anyone here? When he comes, please ask him to wait. Anyone is more common than anyone else and appears frequently in spoken language.
Third, the emphasis is different.
1, someone: someone is often used in affirmative sentences.
Anyone: Anyone is often used in negative sentences and interrogative sentences.