What actors and actresses appeared in Dang wo men tong zai yi qi - 2006?

You're asking about the cast of the 2006 Taiwanese drama "When We Were Young" (often translated as "Dang Wo Men Tong Zai Yi Qi"). Here's the main cast:

* Joe Cheng as He Yuan Jiang

* Ariel Lin as Shen Yue Xin

* Kingone Wang as Shen Yue Lin

* Jiro Wang as Li Jie

* Tiffany Hsu as Ke Jia Yi

* Darren Chiu as Cai Yi Jie

There are many other supporting actors and actresses in the drama. You can find a complete list on websites like IMDb or MyDramaList.