Textual research on Liu zhong's post as ambassador

"Liu Zhong Messenger Post" is widely circulated. According to the book Painting a Boat in Qinghe, Zhang Chou in the Ming Dynasty: "Yan Zhenqing's large-character Yingzhou Post is an ancient legacy of Song Xuan and Yu Dafu, and Zhang Ke and his family were hidden in the early Yuan Dynasty." According to Wang Zhi's afterword: 1363 (twenty-three years from Yuan Dynasty to Zheng Dynasty), Wang Zhi obtained the Preface to Lanting Collection from Lu Jianzhi and the Preface to Shang Bo Collection from Zhang Xiaojiang. In the Ming Dynasty, it belonged to the "Teana Pavilion" in Xiangbianyuan, and then it fell into the factory. In the early years of the Republic of China, he returned to Li Shizeng. There are two and a half seals of Sanhuai and Yuesheng in the post, as well as seals of Shaoxing, Zhang Yan's private seal, Wang Zhi and Xiangbian's original seal. Later, there were inscriptions by Wang Yuan, Xian Yushu, Bai Zhanyuan, Tian Shimeng, Hengshan (Wen Zhiming) and Dong Sibai (Dong Qichang). Inscription of "Xihongtang" in Ming Dynasty.