V. II: "generation" has the meaning of generational descent spread the word, "second generation" that is the second generation.

二代：“代”有世系相传的辈分的意思，“二代”即第二代。

youdao

For a dinner or drinks night, a spread collar pairs well with a sport coat or V-neck sweater and looks modern.

WSJ: Guide to Men's Shirt Collars: Which Styles Go With Which Occasions and Flatter the Face