Who was Jian Gong who heard of the war during Tongzhi period?

You seem to remember wrong. It should be the Hongzhi period of the Ming Dynasty, not the Tongzhi period of the Qing Dynasty. After Zhan Ruoshui's death, he got the imperial edict and suicide note of Prince Shaobao. That is Wen Zhan Jian Gong.

Zhan Ruoshui (1466 ~ 1560) was a philosopher, educator and calligrapher in the Ming Dynasty. Ming, named Ganquan, was born in Zengcheng (now Zengcheng City, Guangzhou City, Guangdong Province). Xiaozhong Hongzhi is a scholar and Zhuo was selected. At the beginning of Jiajing of Sejong, he served as assistant minister of wine offering ceremony in Nanjing. After the calendar, there were three books in Nanjing: the Ministry of Rites, the Ministry of Officials and the Ministry of War. Shao Shi worked in Chen Xianzhang and later lectured with Wang Shouren. Everyone has his own portal. Wang gave a lecture on "To Conscience". Zhan gave a lecture on "understanding the principles of nature everywhere", saying: "I call the heart, the body of all things without leaving behind, so there is nothing inside and nothing outside; Yang Ming's so-called heart refers to the person who speaks in the cavity, so he regards what I say as foreign "("Answer Mo "). Emphasizing the worship of God is a kind of kung fu; He said: "Therefore, a good scholar will make another gesture to show respect." (Answer inspector) Author of Zhan Ganquan Collection.