Niki Ji Jia Xi (孙倩颖) or nicknamed as Ding Ding (丁叮), is a graphic artist model from Beijing, China. Apart from that, Niki also acted in several TV dramas, modeled for some local fashion magazines and has her own online boutique hosted at Taobao. Niki is also a very good friend with Hera 何小苗 / 苗苗.