Xiutong

Xiutong is a character from the novel The Langya List (chapter 19 of the webnovel). She is a side-consort of Xiao Jingyu and died following the Chiyan Case. She may be the birth mother of Tingsheng though it's not confirmed.

In the manhua, an unnamed concubine is shown in addition to Princess-Consort Qi, presumably Xiutong.