The New York Times reports:

In the lush, misty valleys of southwest China, satellite imagery reveals the country’s accelerating nuclear buildup, a force designed for a new age of superpower rivalry.

One such valley is known as Zitong, in Sichuan Province, where engineers have been building new bunkers and ramparts. A new complex bristles with pipes, suggesting the facility handles highly hazardous materials.

Another valley is home to a double-fenced facility known as Pingtong, where experts believe China is making plutonium-packed cores of nuclear warheads. The main structure, dominated by a 360-foot-high ventilation stack, has been refurbished in recent years with new vents and heat dispersers. More construction is underway next to it.

Above the Pingtong facility entrance, a hallmark exhortation of China’s leader, Xi Jinping, appears in characters so large they are visible from space: “Stay true to the founding cause and always remember our mission.”

These are among several secretive nuclear-related sites in Sichuan Province that have expanded and undergone upgrades in recent years.

China’s buildup complicates efforts to revive global arms controls after the expiration of the final remaining nuclear arms treaty between the United States and Russia. Washington argues that any successor agreements must also bind China, but Beijing has shown no interest.

“The changes we see on the ground at these sites align with China’s broader goals of becoming a global superpower. Nuclear weapons are an integral part of that,” said Renny Babiarz, a geospatial intelligence expert who has analyzed satellite images and other visual evidence of the sites and shared his findings with The New York Times.

He likened each nuclear location across China to a piece of a mosaic that, seen as a whole, shows a pattern of rapid growth. “There’s been evolution at all of these sites, but broadly speaking, that change accelerated starting from 2019,” he said. [Continue reading…]