Former-commit-id: 946836f9a3f3385c8d3bc6ab82df6edf13ee571c
2. delete split param in data_args.py Former-commit-id: 309d30efe24785912ff751fc573677875fc5819e
Former-commit-id: 19681f93db399d695aa8e35f8ec2a9e720875baa