According to the Basic Law, which lays the ground rules for post-handover Hong Kong, after the transfer of sovereignty both Chinese and English are "official languages." But the Basic Law does not define clearly whether "Chinese" is Cantonese or Mandarin.
根據訂定回歸後香港行事準則的《基本法》規定，九七後中文及英文都是「正式語文」，但基本法「中文」語言的部分到底是廣東話還是普通話，並未清楚界定。