  In this report, we (SuperHelix team) present our solution to KDD Cup
2021-PCQM4M-LSC, a large-scale quantum chemistry dataset on predicting
HOMO-LUMO gap of molecules. Our solution, Lite Geometry Enhanced Molecular
representation learning (LiteGEM) achieves a mean absolute error (MAE) of
0.1204 on the test set with the help of deep graph neural networks and various
self-supervised learning tasks. The code of the framework can be found in
https://github.com/PaddlePaddle/PaddleHelix/tree/dev/competition/kddcup2021-PCQM4M-LSC/.
