What do the indicator statuses of the Xiaomi Router AC1200 mean?

There are two indicator lights on the front panel of the Xiaomi Router AC1200, which are the network status light and the system status light. Both two indicators have two colors, which are blue and orange.
For your reference, the indicator statuses are as follows:
1. When the network status light is off, it means that the network cable is not plugged into the WAN port;
2. When the network status light is always orange, it means that the network cable is plugged into the WAN port but the upstream network is not available;
3. When the network status light is always blue, it means that the network cable is plugged into the WAN port and the upstream network is available;
4. When the system status light is off, it means that the router is not connected to a power source;
5. When the system status light is flashing in orange, it means that the system update is in process;
6. When the system status light is orange and then turns blue after approx. one minute, it means that the system is booting up;
7. When the system status light is orange and doesn’t turn blue after approx. two minutes, it means that a system fault occurs;
8. When the system status light is always blue, it means that the system is working normally.