My sister has been naturalized in the United States. How does my sister apply for an American green card?

Immigration type -F4 Relative immigration schedule: 1 1 year or so (depending on the corresponding increase or decrease of immigration schedule t) Immigration conditions -LZ sister is an American citizen age 2 1. Immigration formalities for applicants without any age limit-submit application I- 130- American embassy in the local area-obtain file number p 1- The case is heard in the immigration office-Approval certificate P2- Application materials are transferred to-NVC-Waiting for immigration schedule (refer to A-D) to complete DS3032 form-Complete I864 life guarantee. Wrap P3- complete DS-230 and send it back to Guangzhou-complete the medical examination of notarized materials/pay fees/attend an interview in Guangzhou-get an immigrant visa through the interview-get P4- official website-I130 from the US Consulate in Guangzhou: http://www.uscis.gov/portal/site/uscis/ menuitem. vgnextoid = c 67 c 7 f 9 de d54 d 0 10 vgnvcm 10000048 f 3d 6 a 1 rcrd & amp； vgnnextchannel = db 029 c 7755 CB 90 10 vgnvcm 1000045 f 3d 6 a 1 rcr rd。 I hope I can help lz.