Either abroad or early career cadre in prefectures well outside of Beijing. What's more interesting is where were their parents doing during the Massacre.

I recommend reading Yashen Huang's "Rise and Fall of the E.A.S.T." [0] - it has a good overview of the cadre during Tiannamen - along with the dated but very comprehensive Tiannamen Papers [1]

[0] - https://yalebooks.yale.edu/book/9780300274912/the-rise-and-f...

[1] - https://www.hachettebookgroup.com/titles/liang-zhang/the-tia...