1. Incorrect time: the recruitment phone may only be answered at a certain time, and no one will answer the phone at the wrong time.
2. Wrong number: The phone number you entered is wrong. I suggest you check it carefully.
3. Recruitment has been completed: the recruitment of China Gas Company has been completed or suspended, resulting in no one answering the phone.
4. The phone is busy: The busy recruitment phone will cause the phone to be disconnected or wait for a long time.