Who is Zhang Mengjin in history?

No, Xu Zhenqing was changed to Zhang Mengjin in the game.

The Four Great Talents in the South of the Yangtze River

Tang Yin (1470-1523), also known as Bohu and Ziwei, also known as Liuru Jushi, Master of Taohua Temple, Tang Sheng of Lu State, and Fleeing Zen Immortal Officials, etc., are said to have been born in the Yin month, Yin day and Yin time of the Gengyin year, the sixth year of Chenghua, Emperor Xianzong of the Ming Dynasty, so they were named Tang Yin. Han nationality, native of Wuxian County (now Suzhou, Jiangsu Province). He was cynical but talented. He was good at famous poems and prose. He was known as one of the "Four Talents of Jiangnan" together with Zhu Yunming, Wen Zhengming, and Xu Zhenqing. He also had more famous paintings, and was known as one of the "Four Wu Clan Schools" together with Shen Zhou, Wen Zhengming, and Qiu Ying.

Zhu Yunming (1460-1527) was named Xizhe and named Zhishan. Because his right hand had six fingers, he named himself "Zhi Zhisheng". He was also named Zhishan Laoqiao, Zhizhishan people, etc. Han nationality, from Changzhou (now Suzhou, Jiangsu). He has a good background in poetry and calligraphy. Especially his cursive calligraphy is highly praised by the world. It is said that "Tang Bohu's paintings and Zhu Zhishan's calligraphy" are popular.

Wen Zhengming (1470-1559), formerly known as Bi, also had the courtesy name Zhengming. At the age of forty-two, he began to use the character Xing and changed the character Zhengzhong. Because he was born in Hengshan, he was named Hengshan Jushi, and was known as "Wenhengshan" in the world. He was a painter, calligrapher and writer in the Ming Dynasty. Han nationality, from Changzhou (now Suzhou, Jiangsu). He was born in the sixth year of Chenghua reign of Emperor Xuanzong of Ming Dynasty and died in the 38th year of Jiajing reign of Emperor Shizong of Ming Dynasty. He was ninety years old. Poet masters Bai Juyi and Su Shi, literary masters from Wu Kuan, calligraphy from Li Yingzhen, and painting from Shen Zhou. In poetry, together with Zhu Yunming, Tang Yin and Xu Zhenqing, he is known as one of the "Four Talents in Wuzhong". In the history of painting, together with Shen Zhou, Tang Yin and Qiu Ying, they are known as the "Four Wu Schools".

Xu Zhenqing (1479-1511), also known as Changgu, also known as Changguo, was a native of Meili Town, Changshu. He later moved to Wuxian County (now Suzhou, Jiangsu Province). He was a writer of the Ming Dynasty and was known as the "Wuzhong Poetry Champion". One of the Four Talents in the Middle School (also known as the Four Talents in Jiangnan). He is famous for his quatrain "The articles on Jiangzuo's family are full of jade, and the moonlight is on the trees and flowers in Yangzhou".