There were many candidates for the chief assistant of the Chongzhen cabinet, including Shi Yulai, Li Guo, Lai Zongdao, Zhou Daodeng, Han Yulai, Li Biao, Cheng Jiming, Zhou Yanru, Wen Tiren, Zhang Zhifa, Kong Zhenyuan, Liu Yuliang, Xue Guoguan, Fan Fucui, Zhang Sizhi, Chen Yan, Jiang Dejing, and Wei Zaode. However, because the information provided in the search results was not detailed enough, it was impossible to determine the specific time and achievements of each person as the cabinet chief. Therefore, he could not give an accurate answer.
Xia Yan was Yan Song's previous cabinet chief.
During the Jiajing period, the cabinet chiefs were Zhang Cong, Xia Yan, Yan Song, Xu Jie, Yang Tinghe, Jiang Mian, Mao Ji, Fei Hong, Huanghuai, Xie Jin, Hu Guang, Yang Rong, Yang Shiqi, Huang Jin, Li Chunfang, etc. Among them, Zhang Cong had the best political achievements among the chief assistants during the Jiajing period. He was praised as "In the end of the Jiajing period, there was no one like Fujing (Zhang Cong) among the physiognomists." Xia Yan stood out in the Great Ceremony and became the chief assistant of the cabinet. Yan Song was a powerful official and had once served as the chief assistant of the cabinet. Xu Jie was a famous official of his generation, but he did not stand up to support Xia Yan after he was framed and worked with Yan Song for more than ten years. Yang Tinghe, Jiang Mian, Mao Ji, Fei Hong, Huang Huai, Xie Jin, Hu Guang, Yang Rong, Yang Shiqi, Huang Jin, Li Chunfang, and others had also served as cabinet chiefs during the Jiajing period.
Zhang Juzheng became the chief assistant of the cabinet in the sixth year of Longqing (1572).
Yan Song served as the chief assistant during the Jiajing period of the Ming Dynasty, but the given search results did not mention the specific time he served as the chief assistant. Therefore, I don't know exactly when Yan Song became the chief.
After Shen Shixing, the chief assistant of the cabinet was Wang Xijue.
The rank of the cabinet chief was different in different dynasties. In the Ming Dynasty, the chief assistant of the cabinet was usually a first or second rank official. In the Qing Dynasty, the chief assistant of the cabinet was usually a third or fourth rank official. However, the specific rank of the official position was not clearly defined, but was determined according to the specific situation. Therefore, it was impossible to accurately answer the rank of the cabinet chief.
After Zhang Juzheng, Shen Shixing was the chief assistant of the cabinet.
After Zhang Juzheng, the cabinet chiefs were Yang Shiqi, Yang Rong, Gao Gong, Xu Jie, Shen Shixing, Ye Xianggao, and Yang Tinghe.
After Zhang Juzheng, Shen Shixing was the chief assistant of the cabinet.