Before revision:  We show that the performance of the models obtained by our framework is better than state-of-the-art GNN methods . Furthermore, our framework can discover explainable meta-graphs in heterogeneous graphs .
After revision:  We show that the performance of the models obtained by our framework is better than state-of-the-art heterogeneous GNNs and also improves efficiency compared with those methods which can implicitly learn meta paths .