Context: Following Kammu's death in 806 and a succession struggle among his sons, two new offices were established in an effort to adjust the Taika-Taihō administrative structure. Through the new Emperor's Private Office, the emperor could issue administrative edicts more directly and with more self-assurance than before. The new Metropolitan Police Board replaced the largely ceremonial imperial guard units. While these two offices strengthened the emperor's position temporarily, soon they and other Chinese-style structures were bypassed in the developing state. In 838 the end of the imperial-sanctioned missions to Tang China, which had begun in 630, marked the effective end of Chinese influence. Tang China was in a state of decline, and Chinese Buddhists were severely persecuted, undermining Japanese respect for Chinese institutions. Japan began to turn inward.

Question: In what year did Emperor Kanmu die?
Answer: 806

Question: What office replaced the imperial guards?
Answer: Metropolitan Police Board

Question: What new office allowed government to issue administrative orders faster?
Answer: Emperor's Private Office

Question: Tang China's influence over Japan ended in what year?
Answer: 838

Question: who's sons died in 806?
Answer: Unanswerable

Question: What administative structure was abolished in 806?
Answer: Unanswerable

Question: What office eliminatedthe need for the emorer to issue administrative edicts?
Answer: Unanswerable

Question: Who did the imperial guard replace
Answer: Unanswerable

Question: Who's influence began to increase in 630?
Answer: Unanswerable