History of Zigong
The area of Zigong has a long history in ancient China – with the invention and development of “Percussion Drilling rig” being one of the city’s accomplishments. There are essentially two cities – that of the old and the new. The city was reached by rail in the 1950s. Several four-lane highways reach the city from other cities in the Sichuan province. The new city of Zigong has been modernizing since the late 1970s – but more rapidly since the early 1990s. The old “Salt” city is based on industry and farmland and a new “Tourism” city which caters primarily to Chinese tourists (as Zigong is better known within mainland China). Zigong is host to the Sichuan University of Science and Engineering as well as a new High Technology Zone.
Source From: https://en.wikipedia.org/wiki/Zigong