Urgent ~ what is the first veritable secretary position in Chinese history?

During the Yin and Shang Dynasties, the work of historians also had obvious functions as staff officers. Whenever the Shang king wants to go out to war, build a city, be an official or get married, he always asks the historian Zhen divination about God's will. If it is not feasible from the result of divination, the Shang king will often give up according to God's will. Therefore, historians actually play an important role in advising military and major actions. This kind of official position is called the town historian.