In 555 war broke out between Sil-la and Păk-je. We are not told its cause but Sil-la was victorious and added to her territory a large tract of country along the eastern side of Păk-je, which she erected into a prefecture under the name of Wan-san-ju (now Chŭn-ju). One authority says that in this war Păk-je lost one half of her territory to Sil-la. It seems that Sil-la had by this time developed the taste for diplomatic intercourse with China. Frequent embassies were sent on the long and costly journey. Each of the three powers sent two and three times a year to one or other of the various Chinese courts. The Emperor of the Ch’i dynasty sent Sil-la great store of Buddhistic books. It is said that as many as 1700 volumes were sent at one time. When Păk-jong ascended the throne of Sil-la in 570 the Buddhistic tendencies had begun to bear their legitimate fruits. The king was so given over to it that he became a monk and the queen became a nun. All thought of progress seems to have been given up and the revenues were squandered in sending useless embassies to China. The style of Buddhism prevalent in Sil-la is illustrated by the fact that in the second year of this reign the minister of war took the king severely to task for spending so much time in the chase, though the killing of animals is the first prohibition of the Buddhist law. Tradition says that this faithful minister, Hu-jik, plead in vain, and finally, when dying, asked to be buried near the road the king usually took when going to hunt. It was done and the king when passing the grave heard a noise of warning proceeding from it. When he was told that it was the faithful but neglected Hu-jik, the king determined on the spot that he would reform, and so the faithful minister did more by his death than by his life. It was in the year 586 that Ko-gu-ryŭ again moved her capital northward to the old place near the present Eui-ju. Soon after this the Tsin dynasty in China fell before the victorious Sui, and Ko-gu-ryŭ, who had been friendly with the Tsin but had never cultivated the Sui, was left in an extremely delicate position. She immediately began preparations for repelling a Sui invasion. The Emperor however had no such intentions and sent a swift messenger chiding the king for his unjust suspicions and opening the way for a friendly understanding. This seemed a little strained to the king and he feared treachery; so, while he greatly desired to send an envoy, he hardly ventured to do so.