Hello, are you asking why preschool mathematics in Qiu Guang can't be downloaded? He Qiuguang can download preschool mathematics. Use major search engines on the Internet to search Qiu Guang's pre-school math applications. Search results Click on an official website to download two versions of Android and Apple. Because it is a small-scale app, the enterprise is small, and it will not be placed on the platform of mobile phone application malls of major manufacturers, so He's preschool mathematics can be downloaded.