History: Team SII
2013
- November 11 - Team SII is formed with 24 girls: Chen GuanHui, Chen Si, Dai Meng, Dong ZhiYi, Gu XiangJun, Jiang Yun, Kong XiaoYin, Li YuQi, Miyazawa Sae, Mo Han, Qian BeiTing, Qiu XinYi, Sun Rui, Shen ZhiLin, Suzuki Mariya, Tang Min, Wen JingJie, Wu ZheHan, Xu ChenChen, Xu JiaQi, Xu ZiXuan, Yuan YuZhen, Zhao JiaMin, Zhang YuGe
- November 23 - Shonichi of Team SII 1st Stage
- December 12 - Senshuuraku of Team SII 1st Stage
- December 27 - Shonichi of Team SII 2nd Stage
2014
- April 2 - Dong ZhiYi, Gu XiangJun and Tang Min graduated from SNH48
- May 16 - Senshuuraku of Team SII 2nd Stage
- May 30 - Shonichi of Team SII 3rd Stage
- September 5 - Gong XiaoHe, Yuan DanNi, Zhao Ye, and Zeng LinYu promoted to Team SII
- November 1 - Senshuuraku of Team SII 3rd Stage
- November 7 - Shonichi of Team SII 4th Stage
- November 25 - Zeng LinYu graduated from SNH48
2015
- February 13 - Wu ZheHan demoted to Kenkyuusei
- March 17 - Gong XiaoHe graduated from SNH48
- May 6 - Wu ZheHan promoted to Team SII
- June 20 - Senshuuraku of Team SII 4th Stage
- June 26 - Shonichi of Team SII 5th Stage
- September 13 - Liu LiWei, Shen YueJiao, Xu JiaLi promoted to Team SII
2016
- January 18 - Cheng Jue promoted to Team SII
- February 18 - Shenshuuraku of Team SII 5th Stage
- February 26 - Shonichi of Team SII 1st Waiting Stage
- April 20 - Xu JiaLi transferred to Team B (BEJ48)
- May 14 - Senshuuraku of Team SII 1st Waiting Stage
- May 20 - Shonichi of Team SII 6th Stage
- June 10 - Miyazawa Sae, Suzuki Mariya Transferred to AKB48
- July 30 - Zhao JiaMin graduated from SNH48
- August 14 - Liu LiWei, Shen YueJiao graduated from SNH48
- September 15 - Lv Yi, Pan YanQi, Zhao HanQian promoted to Team SII
2017
- June 10 - Senshuuraku of Team SII 6th Stage
- June 30 - Shonichi of Team SII 7th Stage
- September 10 - Zhao HanQian graduated from SNH48
2018
- February 3 - SNH48 Team Shuffle
- Chen GuanHui, Chen Si, Dai Meng, Jiang Yun, Kong XiaoYin, Lv Yi, Li YuQi, Liu ZengYan, Mo Han, Qian BeiTing, Qiu XinYi, Sun Rui, Shao XueCong, Wu ZheHan, Xu ChenChen, Xu JiaQi, Xu YiRen, Xu ZiXuan, Yuan YuZhen, Yuan DanNi, Zhang YuGe, Zhao Ye
- Liu ZengYan, Shao XueCong, Xu YiRen transferred to Team SII
- Cheng Jue, Pan YanQi, Shen ZhiLin, Wen JingJie transferred to SNH48 Trainee
- Chen GuanHui, Chen Si, Dai Meng, Jiang Yun, Kong XiaoYin, Lv Yi, Li YuQi, Liu ZengYan, Mo Han, Qian BeiTing, Qiu XinYi, Sun Rui, Shao XueCong, Wu ZheHan, Xu ChenChen, Xu JiaQi, Xu YiRen, Xu ZiXuan, Yuan YuZhen, Yuan DanNi, Zhang YuGe, Zhao Ye
- April 30 - Senshuuraku of Team SII 7th Stage
- May 1 - Shonichi of Team SII 7th Stage
- June 23 - Wen JingJie promoted to Team SII
- November 18 - Senshuuraku of Team SII 7th Stage
- November 23 - Shonichi of Team SII 8th Stage
- December 30 - Zhao Ye graduated from SNH48
2019
- January 19 - SNH48 Group Grand Shuffle 2019
- Chen GuanHui, Chen JunYu, Chen Si, Dai Meng, Jiang Yun, Kong XiaoYin, Li YuQi, Liu ZengYan Mo Han, Qian BeiTing, Qiu XinYi, Shao XueCong, Sun Rui, Wu ZheHan, Xu ChenChen, Xu JiaQi, Xu ZiXuan, Yang LingYi, Yuan YuZhen, Yuan DanNi, Zhu XiaoDan, Zhang YuGe,
- Chen JunYu, Yang LingYi, Zhu XiaoDan transferred to Team SII
- Lv Yi transferred to Team X
- Xu YiRen transferred to IDOLS Ft
- Chen GuanHui, Chen JunYu, Chen Si, Dai Meng, Jiang Yun, Kong XiaoYin, Li YuQi, Liu ZengYan Mo Han, Qian BeiTing, Qiu XinYi, Shao XueCong, Sun Rui, Wu ZheHan, Xu ChenChen, Xu JiaQi, Xu ZiXuan, Yang LingYi, Yuan YuZhen, Yuan DanNi, Zhu XiaoDan, Zhang YuGe,
- April 30 - Yang LingYi graduated from SNH48
- August 19 - Xu ZiXuan graduated from SNH48
- September 15 - Chen YuZi, Liu LiQian promoted to Team SII
- September 27 - Zhu XiaoDan graduated from SNH48
- November 7 - You Miao promoted to Team SII
- November 17 - Wang BeiNi promoted to Team SII
2020
- January 4 - Yuan DanNi graduated from SNH48
- March 7 - Wang QiuRu promoted to Team SII
- April 7 - Chen JunYu graduated from SNH48
- June 13 - Wang BeiNi graduated from SNH48
- September 4 - Duan YiXuan, Huang EnRu, Li Hui, Ma YuLing, Ning Ke, Peng JiaMin, Shen XiaoAi, Tian ShuLi, Yan MingJun, Zhao TianYang transferred to Team SII
- September 21 - Liu QianQian had concurrent position in Team SII
- October 3 - Bian ChuXian, Feng YuTing, Liu ChenXue, Lu YeHui promoted to Team SII
- October 14 - Chen GuanHui, Chen Si, Dai Meng, Kong XiaoYin, Li YuQi, Mo Han, Qian BeiTing, Qiu XinYi, Wu ZheHan, Xu ChenChen, Xu JiaQi and Zhang YuGe graduated from SNH48 and became Honorary Graduates
2021
- January 18 - Liu ChenXue graduated from SNH48
- April 7 - Feng YuTing graduated from SNH48
- June 5 - Lu YeHui graduated from SNH48
- August 12 - Liu LiQian graduated from SNH48
- August 28 - Wen JingJie, Yuan YuZhen graduated from SNH48
- September 10 - Bian ChuXian graduated from SNH48
- September 21 - Sun Rui graduated from SNH48
- December 19 - Bei ChuHan, Lu XinYi, and Zhu HanJia promoted to Team SII
2022
- October 23 - Jiang Yun graduated from SNH48
2023
- August 11 - Yang XinYu promoted to Team SII
- August 25 - Zhou TongYue promoted to Team SII
2024
- February 2 - Zhang Qian promoted to Team SII
