Zhāng Yǒngzuò 張永祚 (Qīng; dates and native place unrecorded) is named in the catalog as the compiler (jí 輯) of the Tiānxiàng yuánwěi 天象源委 (KR3fa031), a sixteen-juǎn digest of Qīng-imperial astronomical doctrine. CBDB id 438042 records the name without dates; no further biographical data is securely recoverable.