-If you still work for the original employer (i.e. the I-140 sponsor), then you can file I-485 immediately. If you will work for a new employer, then you have to wait for the new I-140 approval to file I_485. But you can use the old approved I-140 to extend your H-1 beyond the 6-year limit. Talk to your lawyer, and the lawyer will deal with it.
要是第二種情況的話主要怕這些在13個月內搞不定。再次感謝您的指點!