Ajing introduction: The northwest part of the Dong'a ancient city ruins is near Ajing. During the Spring and Autumn Period, Ajing was surrounded by Aze, a large lake. During the Warring States Period, the large lake (Aze) disappeared. According to the old county annals of Yanggu, in 229 AD, during the Three Kingdoms period, Cao Zhi was ordered to rebuild Ajing and create a hexagonal pavilion. This is the earliest record of the construction of a pavilion in Ajing. The secret recipe of "Nine Chaogong Glue" and "Ajing" water are in the Ajing Teahouse managed by Mr. Jin Mingqing.