Is Jining High-tech Development Zone at the county level or the town level?

Jining High-tech Zone is at the county level, but it is at the same level as Jining Central District, rencheng district and the following counties and cities. Qufu's area code belongs to Jining. There is no independent area code. It is 0537.

By the way, the high-tech zone is not only at the county level, but also the salary of working there is much higher than that of other places, which should be the highest.