我怕連premium processing 也來不及。-Just do premium processing, and then ask your employer/lawyer to mail it to you in China.
另外,premium processing approve 以後,我employer 就是新公司了,那visa 上還是舊公司的名字。我能拿著舊公司的visa 和新公司的797入境嗎?
-I don't think it will work because your old employer does not exist anymore and thus, the old H-1 approval notice is invalid. But the visa is valid, so you can use the visa with any valid H-1 approval notice to reenter US.
是不是還要重新簽證呢?-No.