trade. Traditionally the commerce was mostly dominated by Chinese emperors; however, after China lost control of Lelang, northern China came under the rule of Foreign People including Xiongnu, Xianbei and Qiang, all of whom were inexperienced at sea. Baekje established commanderies in the Liaoxi regions of China and advanced into Kyūshū of Japan, and rose as the new trading center of East Asia. Baekje also exported culture to Baekje's allies in the Wa kingdom of Yamato period Japan. The evidence of friendly relationship of Baekje with Japan is the Seven-Branched Sword which Geunchogo gave to the Yamato ruler. Geunchogo also sent scholars Wang In and Ajiki to Japan to spread knowledge of Baekje culture, Confucianism, and Chinese characters. Then Wani taught Confucian classics to emperor's heir Ujinowakiiratuko. Seogi During his reign a history of Baekje titled Seogi (서기, 書記) was compiled by the scholar Go Heung (고흥, 高興). Its purpose was not only to record history, but also to justify his rule and to display the power of Baekje. No known copy of Seogi has survived to the modern era. Samguk Sagi "King Geunchogo was the fourth son of king Biryu. His body and countenance were unusually robust, and he possessed far-reaching knowledge. When King Gye died, he succeeded him." 347 AD, spring, first month. Sacrifices were made gods of heaven and earth. Bae Jin Jeong was made Minister of the Court: he was the queen's relative. His character was vicious and perverse, and he was not benevolent. He turned himself toward petty matters, and he relied on force to make his case. The people hated him. 366 AD, spring, third month. Messengers were dispatched to present gifts to Silla. 368 AD, spring, third month, first day of the month. There was a solar eclipse. Messengers were dispatched to Silla, sent with two good horses. 369 AD, autumn, ninth month. King Sayu of Goguryeo, at the head of 20,000 men on foot and horse, came to the village of Chiyang, and divided his forces to attack and sack the houses of the people. The king dispatched the crown prince with soldiers directly to Chiyang, and they quickly attacked and defeated them. They captured more than 5,000, and these prisoners were presented as gifts to the general and his warriors. Winter, 11th month. A great examination was made [of the troops] in the area south of the Han river. The flags