It is because many patients reserve this number at the same time. During the submission of materials, source number has been reserved by other patients, so it is empty. Solution:

1, you can directly go to the reservation office to check whether there is a mobile reservation number released.

2. Patients who can't get the expert number temporarily can also consult through the telephone provided by the famous medical network in advance, so that doctors can understand the condition first, give corresponding guidance and make an appointment for a doctor.