More information on the standard geography of China is given in North China Plain, or the standard encyclopedias, such as "North China Plain". Britannica. Retrieved 23 December 2022.
A photograph made before 1928 of the two steles in front of the Bell Tower can be found at "The Songshan Shaolin Temple". Kungfu Zoetermeer. under "Taizong Wenhuangdi Yushubei:Three Religions and Nine Schools." The next photograph shows the same two steles in the same relative positions enclosed together in a brick structure.
Khabarovsk, Drum Tower and Bell Tower Khabarovsk, Gofman Oleg Nikolaevich. "Luoyang Road Planner" (in Russian). Translated by Google Translate. The sources for this indexed work are stated by the author to be the area's Guidebooks.
