China’s military has set up a new logistics support force as part of efforts to reform and modernize the world’s largest armed forces, state media has reported.

President Xi Jinping’s push to reform the military coincides with China becoming more assertive in its territorial disputes with Asian neighbors in the East and South China Seas.

China’s navy is investing in submarines and aircraft carriers and its air force is developing stealth fighters.

In January, China created three new military units, including a missile force that controls its nuclear deterrent.