Are there the most programmers in Shenzhen?

Shenzhen is not the place with the most programmers. According to the query of Suqian local program development, what is the programmer's personality? Relevant data show that from the geographical distribution, Beijing, Shanghai, Guangzhou and Shenzhen are the cities with the largest number of programmers, and Guangzhou is the technical talent group with the largest number of programmers in South China.