Attached, the solution for not installing the application is as follows: 1. There is something wrong with the downloaded application, and the download may be incomplete. Suggest to download again and try. 2. The installation position is wrong. Some applications cannot be installed in the memory card, so you can change the installation location in the settings and storage. 3. This system version is not supported. Some apps don't support the latest system, so you can try to install the old app. 4. If the application is already installed on the mobile phone, it is recommended to uninstall it before downloading and installing it.

Qi Hang Education is a large comprehensive education and training institution. Its predecessor was Beijing Qi Hang Examination School, which was established in 1998. Over the past 20 years, Qi Hang has achieved a lofty position in the postgraduate training industry with unremitting efforts and constant pursuit. It is a large-scale comprehensive education and training institution that combines general research education with high-end education and integrates education and training, research and development of educational products and education services. Qi Hang Education is an educational brand engaged in postgraduate training in China, including three business sectors: Qi Hang Education Online, Qi Hang Examination and Training School and Qi Hang Books.