Yangpu Ancient Salt Field, Archaeological salt production site in Yangpu Peninsula, China.

Yangpu Ancient Salt Field is an archaeological site featuring over 1,000 flat stone tanks arranged along the beach. These basins were specifically designed to convert seawater into salt through natural evaporation.

Salt workers migrating from Putian in Fujian province settled here around 800 AD, during the Northern Song Dynasty, and chiselled troughs with a narrow rim into the volcanic rock to sun-dry seawater. The site covers 750 mu and holds more than 1,000 such stones. It was listed as a National Key Cultural Relic Protection Unit in 2013 and joined China's National Industrial Heritage List in 2024.

The salt is known for its flavour and is often used in Chinese traditional medicine. Around 30 families in Yantian village still produce salt on the stones, a method brought by salt workers who migrated from Putian in Fujian province.

The site is most active during summer and autumn months, when around 30 families practice the traditional production methods. These seasons offer the best opportunity to observe the salt-making processes in action.

Each stone tank has a thin rim that captures seawater during high tide, letting natural evaporation create salt. This simple yet clever design allowed workers to operate without artificial technology.