China is rapidly expanding its deep-sea exploration efforts, sending fleets of research vessels far beyond its shores. While ...

The rapid expansion of China’s ocean exploration offers Beijing valuable military intelligence as it expands its naval reach and menaces U.S. allies.

In recent weeks, two of China’s most advanced research vessels, the Xiang Yang Hong 01 and the newer Dong Fang Hong 3 have conducted lawnmower-style sweeps across vast stretches of the eastern ...