How and when BinderProxy Created?

Question

We all know that stub and proxy transact parcel by member 'mRemote'. but what is 'mRemote'? BinderProxy? How and when BinderProxy Created?

private static class Proxy implements com.aispeech.ccui.launcher.IElevatorService
    {
      private android.os.IBinder mRemote;
      Proxy(android.os.IBinder remote)
      {
        mRemote = remote;
      }
      @Override public android.os.IBinder asBinder()
      {
        return mRemote;
      }
      public java.lang.String getInterfaceDescriptor()
      {
        return DESCRIPTOR;
      }
      @Override public void actionUp() throws android.os.RemoteException
      {
          boolean _status = mRemote.transact(Stub.TRANSACTION_actionUp, _data, _reply, 0);
       
      }
    }