What does Tiexuan mean?

Tie Xuan (1366— 1402), a Hui nationality, was born in Dengzhou Chengguan (now dengzhou city) in the Ming Dynasty. Hong Wuzhong, a student of Tiexuan Yitai Square, was given a gift by the Ministry of Rites and was transferred to the Governor's Office to make a decision. He is quick-witted and good at questioning prisons. Zhu Yuanzhang attached great importance to him and gave him the word Shi Ding. Wen Jianchu participated in Shandong politics and defended Jinan. Judy (the fourth son of Zhu Yuanzhang), the prince of Yan, used "Jingnan" as an excuse to transfer troops south. In the second year of his reign (1400), he arrived at the gate of Jinan on June 8. Tiexuan supervises the public and is determined to stick to it. Judy attacked Jinan for three months and went to Jinan to persuade him to surrender. Xuan led the people to surrender and secretly placed a thousand-pound brake on the city gate. When the prince entered the city, the iron gate suddenly fell and almost killed him. Judy was furious. He besieged the city with heavy troops and bombarded it with artillery. This city will be destroyed. Tie Xuan hung Zhu Yuanzhang's portrait on the head of the city, wrote a lot of Zhu Yuanzhang's spirit tablet, and separated it into streams. Yan Jun is not convenient to fire, and the city is preserved. Xuan also recruited strong men, surprised and defeated the Yan army. Yan Jun then cleared the way on September 4, but Nan Zheng dared not take Jinan. Xuan Di joined forces with General Sheng Yong to recapture counties in Texas, and Wen Jian promoted Tie Xuan as Shandong's envoy. Soon, he was promoted to minister of war, praising military affairs. 1402, after Judy proclaimed herself emperor, she set an ambush, captured Tie Xuan and sent him to Nanking. Xuan saw that he was full of curses and stood without kneeling. Judy told him to look north, but he couldn't find it. He died at the age of 37. In the Southern Ming Dynasty, Hong Guang called it "Zhongxiang" and Qing Qianlong called it "Zhong Ding". There is a Qing Dynasty Tiegong Temple dedicated to Iron Xuan by Daming Lake in Jinan, Shandong Province, and a Ming Dynasty Tiegong Temple dedicated to Iron Xuan in Xiaodongguan, Dengzhou, which is commonly known as Guandi Temple to avoid suspicion. Dadongguan has Shuangzhong Hall, dedicated to Tie Xuan and Zhang Xun. There is an iron-selected portrait tomb in Yanyan Village, Longyan Township, dengzhou city.