If your parents will visit US, they may just file I-485 within US to get their green card 3 months later after they enter US, not need to apply for the immigration visa in China. If so, you don't need to do anything with NVC, and just send a letter to NVC to ask them stop processing your parents' cases there (you can wait for your parents to enter US, then inform NVC about that).
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• 多謝8大師!我去跟我爸媽商量下,看他們肯不肯多住幾個月。他們計劃呆三個月零幾天。 -胖饞貓- ♀ (0 bytes) () 05/12/2015 postreply 18:39:38