page allowed in the camera-ready version to: I) expand our literature review to include other related approaches; II)

We are very thankful to all reviewers for their time and valuable comments. We agree that "lots of works have used GCNN for different combinatorial optimization We agree that our benchmark is artificial, and using real-world instances would bring value. Such datasets could be collected, e.g. We intend to include those new results in the final version of the paper. We agree that we should discuss references [a-c] in our literature review.