Insert data in a FIrebase database in another Firebase database using Java

[arpan_de]

In the first image (DB1.jpg), I want the children under the nodes - "19042020111313" & "19042020111506" - which are under the nodes "Cart List-->Admin View-->1122-->Products" to be inserted in the node "19042020185310" under the node "Shipment" which is the second image (DB2.jpg). How do I do it? Please note that I don't want the nodes "19042020111313" & "19042020111506" (in the first image) to be inserted in the node "Shipment" (in the second image).

Thanks