Reviewer # 1: We appreciate many insightful comments from this reviewer

Reviewer #1: We appreciate many insightful comments from this reviewer. We have included more scenarios in the paper. Here are three of them. In this paper, SM stands for the standard two-layer GCN model. In the last few days, we have tried very hard to carry out more experiments on other datasets including'Citeseer', and Table 1: Mean Prediction Accuracy for'Citeseer' Figure 1: Boxplot of RMSEs in real data analysis Reviewer #2: We appreciate many insightful comments from this reviewer.