Examples of mathematical coding in life mainly include the area code of ID card number, the area code of postal code and telephone number segment, which are specifically expressed as follows.

1, ID number

Address code

North China:

Beijing | 1 10000,

Tianjin | 120000,

Hebei province | 130000,

Shanxi province | 140000,

Northeast China:

Liaoning province |2 10000,

Jilin Province |220000,

Heilongjiang Province | 230,000

East China:?

Shanghai |3 10000,

Jiangsu Province |320000,

Zhejiang Province |330000,

Anhui Province |340000,

Fujian Province | 350,000,

Jiangxi Province | 360,000,

Shandong Province | 370,000

Huazhong:

Henan province |4 10000,

Hubei Province |420000,

Hunan Province | 430,000

2. Postal code?

Beijing 100000?

Tongzhou district 10 1 100?

Huairou district 10 1400?

Changping District 102200

Chaoyang district 100020?

Miyun district 10 1500?

Fangshan District 102400

Shunyi District 10 1300

Yanqing district 102 100?

Mentougou District 102300

3. Telephone number field

China mobile number segments: 134, 135, 136, 137, 138, 139, 150,/kloc-. 182、 183、 184、 187、 188、 1705、 178

China Unicom number segments: 130, 13 1, 132, 145( 145 belongs to Unicom wireless network card number segment), 155,/kloc. [ 1]? 、 166

China electric signal section: 133, 153, 180,18, 189, 1700,1700.

Baidu Encyclopedia-Resident ID Number

Baidu encyclopedia-postal code

Baidu encyclopedia-phone number