Cháng ān qū
Chang'an district of Xi'an city 西安市[Xī ān shì], Shaanxi
Chang'an district of Shijiazhuang city 石家莊市|石家庄市[Shí jiā zhuāng shì], Hebei
guó ān jú
abbr. for 國家安全局|国家安全局[gúo jiā ān quán jú]
National Security Bureau (NSB)
National Security Agency (NSA)
jiǎ àn
fabricated legal case
frame-up
bǎo jiǎ zhì dù
the Bao-Jia system (an administrative system organized on basis of households)