Passage: In recent years, the usage of Xiao'erjing is nearing extinction due to the growing economy of the People's Republic of China and the improvement of the education of Chinese characters in rural areas of China. Chinese characters along with Hanyu Pinyin have since replaced Xiao'erjing. Since the mid-1980s, there has been much scholarly work done within and outside China concerning Xiao'erjing. On-location research has been conducted and the users of Xiao'erjing have been interviewed. Written and printed materials of Xiao'erjing were also collected by researchers, the ones at Nanjing University being the most comprehensive. Machida Kazuhiko is leading a project in Japan concerning Xiao'erjing. Books are printed in Xiao'erjing. In Arabic language Qur'ans, Xiao'erjing annotations are used to help women read. Xiao'erjing is used to explain certain terms when used as annotations. Xiao'erjing is also used to write Chinese language Qurans.A Dachang Hui Imam, Ma Zhenwu, wrote a Qur'an translation into Chinese including Chinese characters and Xiao'erjing.

Question: who has had much scholarly work dedicated to him?
Xiao'erjing