Longgang district. According to Sina HowNet, Longgang District in Shenzhen has the largest number of migrant workers, convenient transportation, good environment and many industrial parks. There are many electronics factories, including BYD's four industrial parks in Longgang. The basic salary in Longgang is higher than that in other districts. The rent in Longgang District is cheap and the social security is very secure. These are the issues that migrant workers are most concerned about. Longgang has such superior conditions and more jobs than other districts.