Summary:

- The article reports that Chinese officials are allegedly covering up the sinking of the country's newest nuclear-powered submarine at a pier in the eastern coastal city of Xiamen.
- The incident is said to have occurred in late December 2022, but Chinese authorities have not officially acknowledged it and have been restricting information about the event.
- The sinking of the submarine is a significant setback for China's naval capabilities and raises concerns about the safety and reliability of the country's nuclear-powered submarines.