回复：急, 父母要办探亲签约, 是用学生身份邀请, 还是I-485pending邀请好

我是I-485 pending, 在等待GreenCard排队, 有工作, 薪水还可以, 但存款不多, 只有一万美元.
-It is OK as long as you have a job.

因急事, 要给父母办探亲签证, 来照顾小孩.
-Do not use "父母办探亲签证, 来照顾小孩" as the reason for your parents visa application.

此外, 我的外甥现在加州大学做交换学生, 我的问题是: 是用外甥的学生身份邀请外公外婆, 还是用我的 I-485 pending 身份邀请父母好?
-You is the best sponsor to support you rparents' b2 visa application.

签证成功的把握会大一些?
-Many people like your aprents got the visa.

另外, 邀请的材料要准备哪些?
-You need to provide a invitation letter and Form I-134 plus your recent 3 months paycheck stubs to support your parents' B2 visa application. Check the website of the US Consulate in China to find the ohter required documents for your parents's visa applications.