Research on the Restoration of the Small-sized Post Station Building in the Period of Balhae in the Northeast of China

—Balhae was a tributary state of the Tang Dynasty. It was founded in 698 AD and died in 926 AD in northeast China. It is a vast country with a complete network of post stations. At present, there is no original structure of the Balhae post building in the world. According to archaeological investigation, some small post building sites were found on the Balhae Post road, which were named "24 stones" by the academic circle because of their peculiar construction methods. Based on the technology of digital modeling and field investigation, this paper restores the image of the small-scale post station and promotes the cultural value of the post station building in Balhae.