Policy figures — please confirm against current official information
This article discusses visa bulletin dates, fees, processing times or form versions whose latest figures have not yet been verified. Please confirm with the official sources cited in the article before planning an application.
Chinese edition
优先日是什么
优先日通常代表申请人在相应移民类别中排队的位置，但不同路径形成优先日的事件可能不同。批准通知上的日期很重要，却不能单独告诉你何时获得绿卡。类别转换、旧优先日保留和衍生家庭成员还可能增加复杂性。
表A与表B分别表达什么
国务院签证公告通常列出最终裁定日期和申请递交日期，中文市场常称表A与表B。前者通常关系到移民签证或绿卡能否最终批准，后者在适用时允许更早启动部分申请程序。两张表不能互换使用。
境内申请先看USCIS当月指引
人在美国准备I-485时，不能仅看国务院公告后自行选择较有利的表。USCIS会按月说明家庭类和职业类调整身份申请应使用哪张图表。领事程序则由国务院和NVC体系推进，程序逻辑并不完全相同。
中国申请人看哪一列
配额通常以出生地而非国籍为基础。中国大陆出生申请人需要查看对应列；港澳台或其他出生地可能适用不同列。配偶出生地在部分情况下可能影响配额归属，但必须满足相应规则，不能按护照或居住地自行选择。
排期为什么会倒退
政府会根据年度名额、需求量和已使用数量调整截止日期。前进、停滞甚至倒退都可能发生。某月“current”也不构成未来保证，因此孩子接近21岁、身份即将到期或需要旅行的家庭，应按多种情景规划。
每月应做的检查
确认类别和出生地，记录优先日，查看最新国务院公告，再核对USCIS当月I-485图表。不要把律师或机构几个月前的截图当作当前结论，也不要把案件审理时间与签证排期混为一谈。
保存当月依据
如果家庭根据某月排期采取递交、缴费或转换程序等重要行动，应保存当月签证公告、USCIS图表选择和政府通知。未来发生排期倒退或CSPA争议时，完整的日期证据比事后回忆更可靠。
Note for applicants based in China
Applicants based in China usually also need to handle three things: keeping Chinese- and English-language documents consistent, making sure funds and income can be explained with independent documentation, and managing the gap between priority-date timing and a child's age. Any packaging that doesn't match the underlying facts creates greater risk at the RFE or interview stage.
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Official sources
This article is general educational content and does not constitute legal, investment or tax advice. Tax matters should be assessed for your specific situation by a licensed U.S. tax attorney or CPA.