HUNCHUN, China — Beijing has made several moves in recent months to advance China’s ambitious aim to become the trade and transportation hub of Asia.

To its west, China has agreed to build a rail line across Central Asia. Beijing also said it would help Vietnam plan three rail lines leading to the countries’ shared border. And China is trying to persuade Russia and North Korea to let it reopen a long-closed port on the Sea of Japan.

If successful, the plans would give China closer ties to the economies of Northeast and Southeast Asia, the Mideast and even the Arctic, the latest steps in its 11-year-old Belt and Road Initiative to create a more China-centered global order. Each effort faces obstacles.

The nation’s top leader, Xi Jinping, will need close cooperation from border countries, some of which are politically volatile, like Kyrgyzstan, or internationally isolated, like North Korea. Neighboring countries that have long been wary of China, like Vietnam, will need to be reassured.

A similar venture, a 3-year-old rail line that China has forged into landlocked Laos in Southeast Asia, has been welcomed by some there for bringing an influx of Chinese mining investments and tourism to the country. But others have warned of Chinese domination of the Laotian economy.

“They ended up owning a lot of the land, or at least using a lot of the land, and squeezing out some of the locals,” said Ja Ian Chong, a professor at the National University of Singapore.

The initiatives would also be expensive, and China has begun emphasizing smaller Belt and Road projects elsewhere.

A central factor in the country’s moves is its geopolitical relationship with Russia, whose invasion of Ukraine in 2022 has both helped and hurt China’s effort to build regional transport links.

Russia now depends on China for trucks, drones and other supplies for the war, and has become less of a counterweight to China in struggles for regional influence. As ties have warmed between the two countries, even including many joint military exercises lately in the Sea of Japan and elsewhere, Moscow has been giving more diplomatic support to Chinese projects, notably on the short Russian border with North Korea.

Yet the war in Ukraine has produced a severe labor shortage in Russia, drawing workers in from Central Asia.

Kyrgyzstan, in particular, has been left with too few skilled workers to construct the rail line that China wants to build across its mountains toward Afghanistan and Iran.

“The problem is not just having enough engineers and workers, but enough with the right technical training and background to stay and work in Kyrgyzstan,” said Niva Yau, a specialist on the country at the Atlantic Council, a research group in Washington.

But the collective scope of the projects shows how Xi is wielding infrastructure to cement China’s role as the trade and geopolitical center of Asia.

The toughest project for China, but one with a potentially big payoff, lies in trying to secure access to the Sea of Japan and the Pacific Ocean via the Tumen River.

In the mid-19th century, Russia seized from China a large area of Siberia, including a coastal strip of land that runs south to North Korea and obstructs northeastern China’s access to the ocean. The Tumen River flows along more than 300 miles of China’s border with North Korea, but the last 9 miles of it lie between Russia and North Korea. A low railroad bridge across the river, which the Soviet Union hurriedly built during the Korean War to haul supplies, has blocked all but fairly small boats ever since.

Replacing that bridge with a taller one that would allow oceangoing ships to use the river has long been the dream of Chinese leaders. The goal is to link the Pacific Ocean with a port in Hunchun, an otherwise landlocked Chinese city a few miles up the river.

For Beijing, opening Tumen River traffic would ease trade to Russia, northern Japan and the northeast coast of the Korean Peninsula and even create new shipping lanes to Europe as climate change shrinks the Arctic ice cap.