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Japan_History Tributary system Boon Tang dynasty Emperor Guangwu of Han Ryukyu
01-20
Japan_History Korean peninsula Vietnam_History Tributary system
01-01
![Where was the secret that ancient Japan was able to stay out of the Chinese tributary system?[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)
