Why is Empress Xiaojingcheng also called Empress Kangci?

Bolzigjit, the wife of Xiao Jingcheng of Xuanzong of Tang Dynasty, was born on May 11th, Jiaqing 17th year (18 12 June 19). When I first entered the palace, I was a quiet nobleman. I was a noble for fourteen years and a quiet imperial concubine for twenty years. Wenzong acceded to the throne and respected him as emperor. In July of the fifth year of Xianfeng, Taifei was seriously ill and was honored as the Queen Mother of Kangci. She died on July 9th at the age of 44.