Passage: Xiao'erjing does not have a single, standard name. In Shanxi, Hebei, Henan, Shandong, eastern Shaanxi and also Beijing, Tianjin, and the Northeastern provinces, the script is referred to as "Xiǎo'érjīng", which when shortened becomes "Xiǎojīng" or "Xiāojīng" (the latter "Xiāo" has the meaning of "to review" in the aforementioned regions). In Ningxia, Gansu, Inner Mongolia, Qinghai, western Shaanxi and the Northwestern provinces, the script is referred to as "Xiǎo'érjǐn". The Dongxiang people refer to it as the "Dongxiang script" or the "Huihui script"; The Salar refer to it as the "Salar script"; The Dungan of Central Asia used a variation of Xiao'erjing called the "Hui script", before being made to abandon the Arabic script for Latin and Cyrillic. According to A. Kalimov, a  famous Dungan linguist, the Dungan of the former Soviet Union called this script щёҗин (şjoⱬin; 消經).

Question: What does Xiao'erjing lack?
standard name