Dozens of Chinese naval vessels are exercising this week with an aircraft carrier in a large show of force off Hainan island in the South China Sea, satellite images obtained by Reuters show.

The images, provided by Planet Labs Inc., confirm a Chinese carrier group has entered the vital trade waterway as part of what the Chinese navy earlier described as combat drills that were part of routine annual exercises.

The Liaoning carrier group last week traversed the Taiwan Strait, according to the Taiwanese defense ministry.