有一种电话叫 Pay Phone

-- Get those guys phone number, including your new manager's number;
-- In the evening, at the time you think you need go home, find a pay phone in the street, dial your new boss's office number, see if there is anybody pick upm the phone.

-- Don't like this method? You can directly ask them: "What is your guys working hour?"
-- Yes, I do ask.

Thanks!