2. Signature of Tang Guan. In the first year of Guangzhai (684), it was renamed by Zhongshu Province and renamed in the first year of Shenlong (705). The highest official name of Fengge is literature and history (that is, the highest official name of Zhongshu Province is Zhongshuling). At the beginning of the Tang Dynasty, the order of Chinese calligraphy was third-class, and it was promoted to second-class in Dali (766-779). The Chinese Book Department is mainly responsible for drafting imperial edicts according to the emperor's will. Three provinces and my body: the Chinese book takes the purport, the door is closed, and the ministers serve. Therefore, Fengge has great power, but after arriving in Tang Suzong, it gradually took the official secretariat as the honorary title of general, and did not intervene in political affairs. Instead, it became the "Tongping Zhang Shi" of the Prime Minister. "Ping Zhang Shi and Feng Ge Luan Tai" is the prime minister.