The despatch of the official ships continued as in the days of Nara, not at regular intervals, but generally once during the reign of every Japanese emperor. The impetuous imitation of Chinese legislation slackened in fact, for in that respect we had already borrowed enough. The connection of our country with China began to take the form of ordinary international intercourse, with due reciprocation of courtesies. There remained, however, some need of keeping pace with the political changes in China, and we could not make up our minds to refrain altogether from peeping into the land which we held to be far above our country in civilisation. The last of such an embassy was that sent in the year 843. Half a century afterwards another squadron was ordered to be despatched, and Sugawara-no-Michizane was appointed ambassador. But the squadron was never really sent. For at that time the long dynasty of the T'ang was just drawing near to its end, and the civil war of a century's duration was beginning. There was no more any stable government in China with which we could communicate. Moreover, there was danger to be feared that we might be somehow embroiled in the anarchical disturbances in the Middle Kingdom. The ambassador, Michizane himself, was also of the opinion that little was to be gained by the despatch of the intended squadron, and dissuaded the government from sending it. Japan now entered into the stage of the assimilation of the alien culture already imported in full. Hitherto we had been too busy to make discrimination among those things Chinese which we had engulfed at random. Now we had to make clear which of them was suited, and how others were to be modified in order to make them useful to our country. In short, we had to digest; or to speak by the book, we had to ruminate on what we had already taken. After all it must have been a wise policy to put a stop to the state of national nervousness caused by the incessant introduction of foreign laws, manners, customs, things. The infiltration, however superficial it might have been, left an ineradicable influence owing to the continual process of several centuries. The spirit of the culture of the dominant class became essentially Chinese. Though the saying, "Japanese spirit and Chinese erudition" was henceforth fondly spoken of, the Japanese spirit itself was not yet clearly defined, and did not enter into the full consciousness of the nation. What the ruling nobles, who had imbibed the Chinese spirit already too deeply, could do was only to discard things which became superannuated and untenable.