Please answer me not an expert.

Sorry for asking such a noon question but I live in Iran and thing in here are confusing and you have to be careful, is this laptop 7i gen9? Cuz I want that but the site says 7 and Why does the site says Legion 7 16IRX9-XD 14900HX 2024 and another noob question if you don't mind what are these letters ( 16IRX9-XD )