Send text messages. If the phone is turned on, but at the secretary desk, you can receive SMS. If it is completely turned off, you can't send SMS. This can decide whether to turn on the computer. If it is confirmed that the mobile phone is on, it means that she still cares about her family's concern for herself, and the problem is relatively small.
Ask a friend of the Public Security Bureau for help. Let him do something on the public security network, such as checking whether he is staying in a hotel. Because most people want to live in real names now.