An American citizen applied for his wife to go abroad. How soon can she get a green card after her successful application?

I found it in an overseas application-

Relatively speaking, the quickest and best way is not to get married first. Ask your fiance to find a lawyer in the United States to apply for a K- 1 visa for your fiancee, and ask him to find you an economic guarantor there. Basically, you won't refuse a visa (unless you make the immigration officer suspect that you are cheating). Generally, you can get the K- 1 visa at the Guangzhou Consulate in seven to eight months, and then you can get it in about 20 days after entering the United States. If your marriage has not changed after you get a formal green card, you can apply for naturalization after 3 years. If there is any change in your marriage, you should give a reasonable reason. Immigration thinks the reason is reasonable. You will apply for citizenship in your own name, but like other working immigrants, you must get a green card for five years before you can apply for citizenship. )

(K- 1 visa is faster than any other way, but the difference between K- 1 visa and any other visa is that you must get married within three months. And with the person who applied for you. If you change people halfway, it is invalid! Moreover, visas cannot be transferred to any identity, such as students, jobs and businesses. If you are not married, you must return to China directly. Otherwise, it will be regarded as illegal immigrants. Other visa holders can change their identities after a few years of marriage, only K- 1 can't! ) holders of K- 1 visas are not allowed to enter the United States for three years after returning to China for half a year, and are not allowed to enter the United States for 1 years.