I can’t fault your spelling or grammar here, but the statement ‘the preparative period to being an adult’ to me implies the period before adulthood. That would mean that you are almost, but not quite an adult. If you didn’t mean that, maybe ‘the adult preparative period’ would work better.

Cheers,

Hugh

The Preparative Period of Being an Adult

Yesterday I read an article, it's about the preparative period to being an adult for 20-30 aged young people. They experienced graduating from colleges and finding jobs in this period. Their roles in life are changed and they pursue quality lifes. Thus, they change jobs frequently, or may try different relationships. I am one of them, and I experienced all the things mentioned in this article. Now, I am standing at the end of this period, finding my life career finally. However, my 21-years old brother left to Shenzhen last month. His period is just beginning...