十分感謝8老師這麽快的回複！
I have worked for M company when the H1B case is in pending state from April to November this year. I started working when received the receipt notice of the H1B application from M company. In this case, do you think my out of satus should count from my end of employment date from P company (Febrary）or P company's H1B revoke date (July)?
如果這種情況應該從July算起的話，是不是我還是應該盡快申請I-485？
-You were out of status from the date you left P Company or the date of your latest H-1B I-94 expiration date from P Company, whichever is earliest. Even if you worked for M Company, but you did not get the new I-94 there and thus, you had no legal status when you worked for M Company though the work was legal.
But you may still file the I-485 as soon as possible to see what will happen. Also provide the copies of H-1B approval Notice and the I-94 from P Company. Your spouse may not need to file I-485 with you because you do not want to waste more money if your I-485 is denied. You may also apply for advance parole with the I-485 filing. Then, bring the advance parole with you after it is approved when you go to China to apply for the H-1B visa. Thus, if the visa application is denied, you still can use the advance parole to return to US.
再次感謝8老師！
