Situated at the foot of Qianling Mausoleum,the ancient city of Gan County is a unique turtle-shaped city.The first year of the Tang Ruizong civilization,namely the first year of the Guangming house of Wu Zetian(684 AD),fengtian county was ordered to feng Qianling,hence the construction of the City.

The county was initially built and the city was small.Tang Dezong builds in the first year(AD 780)Tang country teacher Sang Daomao jue:"minister view stem square have son of Heaven king gas,appropriate tall its city to prepare very."Dezong took the advice of Sang Daomao,and ordered Yan Ying(an official in charge of the capital)to send thousands of people,and the Magic Wisdom Army(known as the Forbidden Army of tang)to expand the city of Fengtian.In the fifth week of The Old Sub-city(inner city,namely Fengtian Old city),in the tenth week of luocheng(outer city,namely the new city),there is a wonder,three feet high,two feet deep,two feet wide.After the fall of the city,the city is luo Cheng.

Sangdaomao will fengtian city into a turtle shape,take like yuan Wu.East Han astronomer Zhang Heng Zeng Yun:"the dragon even curled up in the left,the white tiger squat in the right,zhuque fen wing in front,ling Turtle circle as soon as possible,that after the palace shaft also."In the view of"The situation of mountains and rivers in Gancheng,winding and undulating,majestic,luxuriant,lingxiu zhong,there is worship yong,occupying it,this wei Boyang called'xuanwu turtle and snake cochi support'"("Gan County New Annals",Liu Zhifen≪Turtle said city>").After zhu Ci disorderly,one refuge Mukden for half the year,fruit check SangDaoMao words(according to"History As A Mirror").

The kancheng turtle has a long history.North city long and narrow out,that is turtle neck,its Wengcheng for turtle head,south gate short bald turtle tail,east gate,small east gate,west gate,small west gate for the turtle four feet.The city south,North shi gao Tu,cool quasi uplift turtle back,vertical and horizontal streets,like turtle back on the decorative pattern.

At the beginning of the construction of the turtle city,it was intended to worship the Qianling mausoleum.Therefore,officials had a rest in fengtian City during the royal worship day,festival,patrol mausoleum and other sacrificial activities.Therefore,the mausoleum city closely linked,dissolved into one.The ancient Imperial road from the north gate of the city,directly to the lower palace.Kancheng is not only the only place for emperors and their officials to worship,but also often their resting place.

The construction of stone stepping stone road and ancient imperial tourist road connected Qianling with Turtle City more closely.Although the turtle city calendar more than 1,300 years,but still retain the northern and western half of the remaining city,climb the Qianling South,the city's majestic posture,clearly in sight.It has become an integral part of Qianling tourist area.