Why can't the recruitment phone of China Construction Bank get through?

The recruitment numbers of China Construction Bank are all from virtual phone, and I can't get through. These recruitment calls are all virtual numbers, and the numbers displayed on mobile phones are not real. When you call them, they are not available or can't be connected. This is also to prevent too many people from calling for advice and causing unnecessary trouble. The reason for this is that the other party saw the contact information through a platform and used a virtual number when dialing, so it was impossible to dial.