Korean stick (Han) is too abstract

I recently watched several Korean dramas and followed two actors and one actress,

I found that the sub-accounts are too interesting and very compliant with the excellent oo principles based on interface development.

At the beginning, the eyes are abstract and all provide a base class, single eyelid.

Then we will customize the subclass to suit our needs-you like double eyelid, so please ask a doctor to help me cover the implementation of the base class.

In the case of type integration, the first step is interface-based integration-plane face + single eyelid +...

Then, the Child classes are integrated based on the interface, and the on-demand changes.

 

PS: The Generalization type. Is his 2.0 restored to the attribute of the base class?