10086 is the only official customer service phone number of China Mobile, so the customer service phone number of Gansu Mobile is also 10086, regardless of area code. Gansu, referred to as "Gan" or "Long" for short, is the provincial administrative region of People's Republic of China (PRC) (China), with Lanzhou as its capital. Located in the northwest of China, it connects Shaanxi in the east, Xinjiang in the west, Sichuan and Qinghai in the south, Ningxia and Inner Mongolia in the north and Mongolia in the northwest.

1. Gannan Plateau-Gannan Plateau is the "roof of the world"-a corner of the eastern edge of the Qinghai-Tibet Plateau, with high terrain and an average elevation of more than 3,200 meters, which is a typical plateau area. Here, the grass beach is broad, the water plants are rich and beautiful, and Mazhuang cattle are fat, which is one of the main animal husbandry bases in Gansu Province.

2. Hexi Corridor-Hexi Corridor is located at the northern foot of Qilian Mountain and the southern foot of Beishan Mountain, starting from Wushaoling in the east and reaching the border of Gan Xin in the west. It is a long and narrow strip inclined from east to west and from south to north. The altitude is between 1000- 1500m, the length is about 1000m, and the width varies from several kilometers to several hundred kilometers.

Hexi Corridor is a famous Gobi oasis with flat terrain, good mechanized farming conditions, sufficient light and heat, and abundant water resources. Agriculture has broad prospects for development and is the main commodity grain base in Gansu.

3. Qilian Mountain Land-Qilian Mountain Land is located in the south of Hexi Corridor, with a total length of 1000 kilometers, most of which are above 3500 meters above sea level. It is a natural solid reservoir of perennial snow glaciers in Hexi Corridor, with obvious vertical distribution of vegetation. The highest point in Gansu Province is Tuanjie Peak, the main peak of Qilian Mountain, with an altitude of 5,827 meters.

4. Longdong and the central part of the Loess Plateau-Longdong and the central part of the Loess Plateau are located in the central and eastern part of Gansu Province, starting from the border between Gansu and Shaanxi provinces in the east and reaching Wushaoling in the west. The ancestors of the Chinese nation were born here in history, and the homes of the descendants of the Chinese people were established here. The earth's crust has changed for hundreds of millions of years, and wars and disasters have eroded the Loess Plateau.

In particular, the central area of Dingxi has become one of the poorest places in China, but Longdong and the central part of the Loess Plateau are rich in oil and coal resources.

The above contents refer to Baidu Encyclopedia-Gansu.