[https://edition.cnn.com/2021/07/05/tech/china-cybersecurity-ban-apps-intl-hnk/index.html](https://edition.cnn.com/2021/07/05/tech/china-cybersecurity-ban-apps-intl-hnk/index.html) >"Just one day after ride-hailing giant Didi was banned from app stores in China, authorities have started investigating three other major technology services, citing concerns about national data security."