춘추좌씨전
Zhang Cang was also a representative Confucian scholar of the transition period from the Warring States to Han. Kong Yingda (574 – 648) names him as recipient of Xunzi's transmission of the "Zuo Zhuan" (The Zuo Commentary to the Spring and Autumn Chronicle) His expertise in the "Zuo Zhuan" did not constitute the mainstream in the field, since the "Zuo Commentary" was related to the Old Text school, while in his time the New Text school was more popular (see New Text Confucianism).