People watch as Russian warships fire missiles during the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 26, 2020. REUTERS/Alexey Pavlishak

A Russian warship fires missiles during the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 26, 2020. REUTERS/Alexey Pavlishak

The Russian Navy's missile corvette Dmitrovgrad sails past the Dvortsoviy Bridge over the Neva River during the Navy Day parade in Saint Petersburg, Russia July 26, 2020. Dmitri Lovetsky/Pool via REUTERS

The Russian Navy's missile corvette Dmitrovgrad sails past the Dvortsoviy Bridge over the Neva River during the Navy Day parade in Saint Petersburg, Russia July 26, 2020. Dmitri Lovetsky/Pool via REUTERS

Russian warships sail past the Dvortsoviy Bridge over the Neva River during the Navy Day parade in Saint Petersburg, Russia July 26, 2020. Dmitri Lovetsky/Pool via REUTERS

Russian warships sail along the Neva River during the Navy Day parade in Saint Petersburg, Russia July 26, 2020. Dmitri Lovetsky/Pool via REUTERS

A Russian Navy officer stands on the embankment as warships sail during the Navy Day parade in Kronstadt near Saint Petersburg, Russia July 26, 2020. REUTERS/Anton Vaganov/Pool

Russian warships sail during the Navy Day parade in Kronstadt near Saint Petersburg, Russia July 26, 2020. REUTERS/Anton Vaganov/Pool

A member of a military band performs as Russian warships sail during the Navy Day parade in Kronstadt near Saint Petersburg, Russia July 26, 2020. REUTERS/Anton Vaganov/Pool

A seagull flies as Russian warships sail during the Navy Day parade in the far eastern city of Vladivostok, Russia July 26, 2020. REUTERS/Yuri Maltsev

Russian warships sail during the Navy Day parade in Kronstadt near Saint Petersburg, Russia July 26, 2020. REUTERS/Anton Vaganov/Pool

A seagull flies with a catch as Russian warships are seen during sunset ahead of the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 24, 2020. REUTERS/Alexey Pavlishak

Russian warships sail along the Neva River with the St. Isaac's Cathedral in the background during a rehearsal for the Navy Day parade in Saint Petersburg, Russia July 24, 2020. REUTERS/Anton Vaganov

Russian sailors line up onboard a warship during the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 28, 2019. REUTERS/Alexey Pavlishak

A Russian sailor watches as a warship fires missiles during the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 28, 2019. REUTERS/Alexey Pavlishak

A boy points as Russian warships sail during the Navy Day parade in Kronstadt near Saint Petersburg, Russia July 28, 2019. REUTERS/Anton Vaganov

Russian warships sail during the Navy Day parade in Kronstadt near Saint Petersburg, Russia July 28, 2019. REUTERS/Anton Vaganov

Russian sailors line up onboard a warship during the Navy Day parade in Kronstadt near Saint Petersburg, Russia July 28, 2019. REUTERS/Anton Vaganov

A boat with tourists sails past a Russian warship on sunset ahead of the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 27, 2019. REUTERS/Alexey Pavlishak

A view shows a Russian warship on sunset ahead of the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 27, 2019. REUTERS/Alexey Pavlishak

A view shows Russian warships on sunset ahead of the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 27, 2019. REUTERS/Alexey Pavlishak

People talk in front of a Russian warship ahead of the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 27, 2019. REUTERS/Alexey Pavlishak

A view shows a Russian warship on sunset ahead of the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 27, 2019. REUTERS/Alexey Pavlishak

A view shows Russian warships and a sailing vessel during a rehearsal for the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 26, 2019. REUTERS/Alexey Pavlishak

Russian sailors line up onboard a warship during a rehearsal for the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 26, 2019. REUTERS/Alexey Pavlishak

People watch a Russian warship firing missiles during a rehearsal for Russia's Navy Day parade in the Black Sea port of Sevastopol, Crimea July 26, 2019. REUTERS/Alexey Pavlishak

Russian sailors line up onboard a warship near a military submarine during a rehearsal for the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 26, 2019. REUTERS/Alexey Pavlishak

Russian sailors line up onboard a warship as a military helicopter flies past during a rehearsal for the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 26, 2019. REUTERS/Alexey Pavlishak

Russian sailors line up onboard a warship during a rehearsal for the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 26, 2019. REUTERS/Alexey Pavlishak

A Russian warship fires missiles during a rehearsal for the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 26, 2019. REUTERS/Alexey Pavlishak

Russian sailors line up onboard a warship during a rehearsal for the Navy Day parade in the Black Sea port of Sevastopol, Crimea July 26, 2019. REUTERS/Alexey Pavlishak

Russian warships and a military submarine sail during a rehearsal for the Navy Day parade in Kronstadt near Saint Petersburg, Russia July 21, 2019. REUTERS/Anton Vaganov

Russian warships and helicopters are seen during a rehearsal for the Navy Day parade in Kronstadt near Saint Petersburg, Russia July 21, 2019. REUTERS/Anton Vaganov

British Royal Navy destroyer HMS Duncan (D37) sails in the Bosphorus, on its way to the Mediterranean Sea, in Istanbul, Turkey, July 12, 2019. REUTERS/Murad Sezer

British Royal Navy destroyer HMS Duncan (D37) sails in the Bosphorus, on its way to the Mediterranean Sea, in Istanbul, Turkey, July 12, 2019. REUTERS/Murad Sezer

Japan's Maritime Self-Defence Forces listen to a speech during a visit of Japanese warship JS Samidare at Jakarta International Container Terminal at Tanjung Priok port in Jakarta, Indonesia, May 8, 2019. REUTERS/Willy Kurniawan

Japan's Maritime Self-Defence Forces' members prepare to dock during a visit of Japanese warship JS Samidare at Jakarta International Container Terminal at Tanjung Priok port in Jakarta, Indonesia, May 8, 2019. REUTERS/Willy Kurniawan

Indonesian navy forces' marching bands is seen as they welcome Japan maritime self-defence forces during a visit of Japanese warship JS Samidare at Jakarta International Container Terminal at Tanjung Priok port in Jakarta, Indonesia, May 8, 2019. REUTERS/Willy Kurniawan

Over the past two decades, China has built the world's biggest navy, amassing 400 warships and submarines.

By 2030, China could attain rough parity with the U.S. navy in terms of both the quality and number of its warships.

Chinese navy personnel wait to attend a welcoming ceremony for the Indian navy commissioned warship INS Kolkata at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Chinese navy personnel waits to attend a welcoming ceremony for the Indian navy commissioned warship INS Kolkata at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

An Indian navy commissioned warship INS Kolkata arrives at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

A slogan is seen on the back of the Indian navy commissioned warship INS Kolkata as it arrives at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Chinese navy personnel walk along the India navy commissioned warship INS Kolkata at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Captain of the Royal Australian Navy's Adelaide class guided missile frigate HMAS Melbourne (III) Marcus Buttler gestures as his warship arrives at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

An Indian military official walks along the commissioned warship INS Kolkata at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Indian navy personnel are seen as their commissioned warship INS Kolkata arrives at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

An Indian navy personnel stands guard upon the Indian navy commissioned warship INS Kolkata arrival at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Captain of the Indian navy commissioned warship INS Kolkata Aditya Hara speaks to the media upon his warship arrival at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Indian navy personnel are seen as their commissioned warship INS Kolkata arrives at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Captain of the Indian navy commissioned warship INS Kolkata Aditya Hara is greeted upon his warship arrival at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Captain of the Indian navy commissioned warship INS Kolkata Aditya Hara speaks to the media upon his warship arrival at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Indian navy personnel are seen as their commissioned warship INS Kolkata arrives at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Indian navy personnel are seen as their commissioned warship INS Kolkata arrives at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Captain of the Indian navy commissioned warship INS Kolkata Aditya Hara is greeted upon his warship arrival at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee

Indian navy personnel are seen as their commissioned warship INS Kolkata arrives at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee