ZIGONG, a thriving industrial centre, has long been an important source of salt, tapped for thousands of years from artesian basins below the city. In the fourth century, the Sichuanese were sinking 300m-deep boreholes here using bamboo-fibre cables attached to massive stone bits; by the 1600s, bamboo buckets were drawing brine from wells bored almost 1km beneath Zigong, centuries before European technology (which borrowed Chinese techniques) could reach this deep. Natural gas, a by-product of drilling, was used from the second century to boil brine in evaporation tanks, and now also powers Zigong’s buses and taxis.

Travel offers; book through Rough Guides

China features

The latest articles, galleries, quizzes and videos.

26 awe-inspiring architectural wonders

26 awe-inspiring architectural wonders

From ancient temples to hyper-modern skyscrapers, these are just a few of the world's most incredible architectural wonders. Whether you're looking to wander l…

01 Feb 2017 • Rough Guides Editors camera_alt Gallery
China travel tips: 8 things you need to know before you go

China travel tips: 8 things you need to know before you go

Even 20 years ago China was not a conventional tourist destination. Despite the allure of its beautiful landscapes and history-filled cities, politics, poverty,…

13 Jan 2017 • Simon Frank insert_drive_file Article
The roof of the world: a first-timer's guide to Tibet

The roof of the world: a first-timer's guide to Tibet

The ‘roof of the world’ has exerted a magnetic pull over travellers and adventurers for centuries. This vast, high altitude desert has spawned myths and leg…

10 Nov 2016 • Stuart Butler insert_drive_file Article
View more featureschevron_right

Join over 60,000 subscribers and get travel tips, competitions and more every month

Join over 60,000 subscribers and get travel tips, competitions and more every month