Are they really have the job at night? What kind of people will moving at midnight? Now I'll tink about will he go to main China or has other woman....
From my point of view, you hasband will earn than than before if his working hour is 7:00am till mid-night. Keep check his money, if he paid to you more than before, that means he is hard working. otherwise, try to talk with him, maybe 貨VAN佬 is not suitable for him!