display parent field values in the child fields,display grandparent field values in the grandchild using plugin or javascript

Hi friends,

I have 3 entities country,state and district.

State(child) entity has country(parent) lookup.country has 2 single line fields,i want to display 2 fields in child when country lookup is selected and saved.

next

In district entity I want to display country 2 fields when i select the state lookup.

district has state lookup.

How can we do it using plugin and Javascript??

Thank you!