Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SUN Xiaohan and KONDO Kunio and SASAKI Kazuo,Proposal of a pinyin vocal practice app in Chinese preschool education using voice recognition technology,Reports of the Technical Conference of the Institute of Image Electronics Engineers of Japan,,The Institute of Image Electronics Engineers of Japan,2021,20.03,0,103-105,https://cir.nii.ac.jp/crid/1390577078293140352,https://doi.org/10.11371/wiieej.20.03.0_103