Hall of mental cultivation's plaque "Benevolence", written by Yongzheng, said that the emperor should be moderate, upright, kind and harmonious, which is a high requirement for his own code of conduct; The plaque "Diligent and Sage-loving" on the West Nuan Pavilion in hall of mental cultivation was also inscribed by Yongzheng Imperial Pen.
In addition, the "Sanxi Hall" plaque of Yangxintang was written by Gan Long; At the back of the front hall of hall of mental cultivation, there is a tablet inscribed by Emperor Xianfeng and stamped with the seal of Xianfeng.
The plaque symbolizing imperial power and embodying the ideal of governing the country has always been valued by princes and ministers. Historically, no one other than the emperor had the right to inscribe the front doors of all royal gardens and palaces in the Qing Dynasty, but some special cases occurred.
The plaque "_ _ Adding Ugliness" on the north inner eaves of the West Second Room of the Forbidden City was inscribed by Zai Tian and stamped with the words "Treasure of Guangxu"; The plaques on the halls of Taihe, Zhaode and Zhendu were not written by the emperor, but were inscribed by Wang Faliang, a famous calligrapher in Qing Dynasty.