Introduced the two knife coins excavated in Okinawa in the years of 1923 and 1992, andthought they were the currency belong to Yan State of the Warring States period of China byanalyzing their type and characters, als...Introduced the two knife coins excavated in Okinawa in the years of 1923 and 1992, andthought they were the currency belong to Yan State of the Warring States period of China byanalyzing their type and characters, also it was sure that there existed a southward seaway fromthe east part of Liao Ning province to Okinawa.展开更多
文摘Introduced the two knife coins excavated in Okinawa in the years of 1923 and 1992, andthought they were the currency belong to Yan State of the Warring States period of China byanalyzing their type and characters, also it was sure that there existed a southward seaway fromthe east part of Liao Ning province to Okinawa.