Which of the following descriptions of traditional Bluetooth operation is correct for HarmonyOS devices?

Bluetooth device scan can be initiated through the startBtDiscovery() interface

Before starting Bluetooth scanning, you need to register to broadcastBluetoothRemoteDevice

EVENT_DEVICE_DISCOVERED

You can use the getLocalName() interface to check whether Bluetooth is turned on

If you want to get the scanned device, you must inherit the onReceiveEvent(CommonEventData data) method that implements the ConmonEventSubscriber class when you register the broadcast, and receive the EVENT_DEVICE_DISCOVERED broadcast