China's Three Gorges shipping expansion project has reached a major milestone, with excavation work completed in a preliminary construction area.

The site stretches 935 meters and reaches a depth of over 122 meters, roughly the height of a 40-story building. The work paves the way for the construction of new ship locks that will allow vessels with a capacity of up to 10,000 tonnes to navigate the Yangtze River through the Three Gorges area.