CN is the country code, not the language code. zh-CN is simplified chinese localized to mainland China. If you want simplified chinese try something like zh-HK

CN is the country code, not the language code. zh-CN is simplified chinese localized to mainland China. If you want simplified chinese try something like zh-HK or zh-SG. But there is valid criticism to be had that Apple should be signposting more visibly the differences between its settings for CN and outside CN.