The new ThinkBook S models may replace the 13 and 14-inch Ideapad S-series models, at least in China. They appear to have updated designs with improved metal chassis, slim lateral bezels and displays that can unfold flat on the table and the specs include Intel Core i7-8565U CPUs, up to 16 HB RAM and up to 512 GB NVMe SSDs. The more expensive variants may integrate discrete AMD Radeon 540X GPUs.
https://www.notebookcheck.net/Lenovo-ThinkBook-S-spotted-in-China-could-hit-Europe-in-May.420064.0.html
They just keep THINKing up creative new names....
Me thinks Lenovo has ran out of ideas.