The grand secretariat (neigeguan 内閣官), which was established during the reign of the Ming Emperor Yongle (1403-1424), continued to maintain a steady influence on the politics of the day within the political system of the Ming dynasty. One of the specific responsibilities borne by the grand secretariat was to present lectures to the emperor, in other words it was charged with classics colloquium, (jingyan 経莚). In addition, it can be assumed that as a result of implementing the classics colloquium it is possible that the formation pf a path for promotion of Ming-dynasty bureaucrats of the Hanlin Academy to the grand secretariat was advanced. Therefore, in the study of the history of the grand secretariat system, the existence of the classics colloquium cannot be disregarded. The aim of this article is to elucidate the turning point during which the classics colloquium system was established. In the first section, I survey what form instruction of the emperor was carried out prior to Emperor Xuande (1426-1435) and confirm each emperor during this period was left to his own devices to read as he saw fit. Moreover, I indicate the fact that prior to Xuande, the object of the instruction of the bureaucrats was the heir apparent who was anticipated to ascend to the throne. Thereafter in this section I analyze the sequence of events that led to the providing lectures to Emperor Yingzong in the Zhengtong era (1436-1449). In the pertinent portion I first confirm the situation in which the Dowager Empress Zhang, the grandmother of Yingzong, maintained influence on political settlements after his accession to the throne. Then, I clarify the fact that there was a plan to begin providing lectures to the heir apparent Yingzong in the last years of Xuande's reign and that bureaucrats who would have been close to the heir apparent, who was raised during the Xuande period, were made to participate in the classics colloquium for Yingzong. In addition, I state that the classics colloquium in the Zhengtong era was a measure implemented on an ad hoc basis in the form of evoking the actual plan of instruction that was from the first planned for the heir apparent because Yingzong was a child at his accession and not sufficiently mature to carry out political affairs. In the second section, I introduce the memorial to the throne of Hanlin Academy expositor Liu Qiu 劉球, which was submitted in the Zhengtong era, and comment on the fact that the effect of regulating the daily life of the emperor came to be seen in the implementation of the classics colloquium. In addition, I analyze the content of the memorials that were submitted by the bureaucrats chiefly from the period directly after the Tumu Incident through the reign of Jingtai, 1450-1457, seeking to encourage the emperor to study by means of the classics colloquium. Then I make clear that the bureaucratic officials of the time struggled to find a method of managing to a certain extent the daily life of the emperor beyond court functions based on their reflections on the politics leading up to the Tumu Incident. Moreover, in the first years of the Jingtai reign, Chen Xun 陳循, who had obtained a position in the grand secretariat prior to Jingtai's accession to the throne, strongly led the preparations for implementing the classics colloquium. As a result the classics colloquium was implemented for Emperor Jingtai. Due to the implementation of the classics colloquium in the reign of Jingtai, there arose a situation in which the emperor would be the object of the instruction of the bureaucrats regardless of his age, and the grand secretariat acquired the position whose duty was to instruct the emperor. As a result, the proper place of the grand secretariat, which was to administer the classics colloquium, was clearly specified in the regulations for implementing the classics colloquium. In short, by the implementation of the classics colloquium during the reign of Jingtai, the grand secretariat first fou