Under the Sui, it was renamed Xicheng Commandery (西城郡, Xīchéngjùn). Under the Tang, it was renamed Ankang Commandery (安康郡, Ānkāngjùn).[1] It held 53,029 people in 14,091 households in 639 and 57,929 people in the same number of households in 742.[1]
《中国历史地名大词典》 [Zhōngguó Lìshǐ Dìmíng Dà Cídiǎn, The Big Dictionary of Historical Placenames in China], China Social Sciences Press, 2005, p. 1601, ISBN7-5004-4929-1. (in Chinese)