謝謝8老師回複
還有幾個問題不太明白
1. 關於分開郵寄，我在網上找到的答案是，分開裝檔案袋（例如：文件包A放入父親的材料，文件包B放入母親的材料），然後放入同一個快遞箱郵寄，這樣做移民局也會明白這是兩份申請而不是一份吧？
-It is fine. Just write the applicant's name on the front of the document bag, such as: Applicant: XXX.
6. Employment history
485 part 4 問的比較細，要求列出五年內的工作。父母退休已經超過五年，需要在問題7裏列出退休前的工作單位信息，地址和日期嗎？
-Not. need.
第一項Employer or School和第二項Name of Employer or School 分別應該寫什麽？
-Put "N/A" in the Employer's Name/Address. Put "Retired" in Your Occupation part. For "Date From," enter the date your retirement began (even if it was more than 5 years ago). For "Date To," enter "Present".
source of financial support應寫什麽？
-Just put "Retirement benefits".
For Item 8 above (in your question), "Most Recent Employment or school Outside the U.S.":
Regardless of how long ago it occurred, your parents must provide their most recent employer or school in China (outside the United States), because it was not already listed in the 5-year history above in your parents' cases.
