People who say Dong 'e Town is the birthplace of Ejiao say: Li Shizhen's Compendium of Materia Medica says: Ejiao comes from Dong 'e, hence the name Ejiao. Li Shizhen was from the Ming Dynasty. Dong 'e Town was once the same area as Dong 'e County during the Hongwu period of Ming Dynasty. In fact, the original text of Li Shizhen's Compendium of Materia Medica reads as follows: Ejiao is a classic top grade. Hongjing said: Out of the East Afuhan, it is called Ejiao. That is to say, Dong 'e in Li Shizhen's text is called Ejiao, which is quoted from Tao Hongjing's Notes on Materia Medica. Tao Hongjing is thousands of years earlier than Li Shizhen. So it can be concluded that Dong 'e County is now the real birthplace of Ejiao! Secondly, Li Daoyuan of the Northern Wei Dynasty said in Notes on Water Classics: "There is a well as big as a wheel in Dong 'a, with a depth of six or seven feet. At the age of 60, I often cook with glue to enrich the land. Shen Kuo's Meng Qian Bi Tan said that Dong 'e also benefited from water, and the glue cooked from a well was called Ejiao, which proved that Ejiao was a tribute in the Northern Wei Dynasty. Both wells were thousands of years earlier than this well, and they were provincial-level protected cultural relics. They were located in Yangcheng, Yanggu, and were under the jurisdiction of Dong 'e County at that time. This well is in the west of Dong 'e County, and Dong 'e Town in Pingyin is in the east of Dong 'e, which has nothing to do with Buddhism.
Thirdly, according to textual research, the earliest record of Ejiao is in the silk book Fifty-two Prescriptions for Diseases unearthed from Mawangdui Han Tomb. In Huainanzi compiled by Liu An, Sophie and Li Shang, the king of Huainan in the Western Han Dynasty, there is a sentence that "one inch of donkey-hide gelatin can't stop the turbidity of the Yellow River", which is the earliest record that gelatin is called donkey-hide gelatin in existing historical books. It can be inferred that Ejiao was interviewed as early as the Han Dynasty.
Therefore, the area covered by Dong 'e in Han Dynasty or even earlier (not in Ming Dynasty) should be the real birthplace of Ejiao!