Hair Rendering and Simulation

Hello! I want to use the hair Groom for ue4.24
I saw this page → 髪のレンダリングとシミュレーションのクイック スタート | Unreal Engine ドキュメント

I used MAYA with Xgen. and Alembicdata was exported from
cache >AlembicCache>ExportSelectionto Alembic

Imported into ue4 .but not well
What’s the problem?