1886, Chengdu telegraph office was built, and Chengdu telecom industry started. 19 1 1 year, Chengdu telegraph office installed 500 magnet telephone exchanges with the assistance of the Ministry of Posts and Telecommunications at that time, and Chengdu had the first telephone. 1957, Chengdu Telecom built 2,500 new automatic exchanges in Taiping Street, which was a step towards 4-digit development. 1981On May 24th, the number of telephone numbers in Chengdu increased from 4 to 5, and there were nearly 10,000 telecom users in Chengdu. 1October 29th, 1988, 10, all telephone numbers in Chengdu were upgraded from 5 digits to 6 digits, and then 2-prefix telephones were upgraded. 199365438+February 12, the telephone number in Chengdu rose to 7 digits. On April 20, 2002, Chengdu's telephone number rose to 8 digits, making it the first provincial capital city in the west to have its telephone number increased to 8 digits.