Client D, a Chinese citizen, married an American citizen and they have a son (of American nationality). Later, his or her spouse submitted an I-130 spousal immigration application for XX and it was approved. With the assistance of the Lawyer team, Client D completed the relevant document preparation and interview guidance, and was issued an IR1 visa to enter the United States. In the same year, they obtained a green card. The lawyer team subsequently initiated the application for naturalization and expedited the process through his spouse's position in an American company. The case involved challenges such as Client D's first B1/B2 visa rejection and the revocation of their children's nationality. The lawyer team ensured the legality and efficiency of the immigration path by supplementing the authenticity of the marriage, coordinating the compliance of laws in China and the United States, and facilitating cross-departmental communication. At present, the green card of Client D is valid, the application for naturalization is pending approval, and the issue of children's nationality has been properly handled through the travel document and revocation application.