We thank all reviewers for their valuable comments, such as the novelty, well-motivated objective and promising results

We thank all reviewers for their valuable comments, such as the novelty, well-motivated objective and promising results. The code "ICP-pytorch" has been anonymously released on GitHub. We rebut key issues point-by-point as below. We sincerely hope R#2 to raise the score. We rebut these concerns below, and will clarify related issues in our paper.