China's Secret Test Base Is Growing Fast
Satellite imagery reveals a massive buildout at China's most secretive flight-test facility — new hangars, taxiways, and possible fuel infrastructure.
By The Defense Desk
China's most secretive airbase, located near the Lop Nur Nuclear Test Base in Xinjiang, is expanding at an accelerating pace. Satellite imagery taken by Planet Labs on August 27, 2026 shows new hangars, taxiways, and possible fuel-storage infrastructure reshaping a facility that, in 2020, was nothing more than a 3.1-mile runway with a small hangar and a few scattered vehicles. [1]
The base — loosely akin to America's Area 51 — sports one of the longest runways in the world at 16,400 feet and has hosted both of China's sixth-generation stealth fighter designs, the J-36 and J-XDS, far from the home airfields of their respective manufacturers, Chengdu and Shenyang. [1]
Three hangars grouped together on the south ramp — each measuring approximately 80 by 40 meters — are sized to accommodate all of the tactical and strategic aircraft in the PLA's current fleet. A fourth hangar appears on its own just farther south on the apron, with different dimensions. For scale, the Xi'an H-6, the PRC's only strategic bomber in active service, has a wingspan of approximately 108 feet. These new shelters are built wider. [1]
Geo-intelligence researcher Damien Symon, who assisted in analyzing the imagery, noted that possible fuel-storage infrastructure under construction would "further expand the base's aviation-support capacity." If confirmed, "the additional infrastructure could support a higher sortie rate and longer periods of sustained flight activity, consistent with an expansion in the scale or tempo of operations at Lop Nur," he added. A 400-foot-diameter circular pad at the northern end — assessed by TWZ as an engine run and turnaround pad — and additional apron extensions round out the buildout. [1]
What reads as a construction ledger is really a posture shift — from a remote airstrip testing the fringes of what flies, to a permanent staging ground for whatever comes next.
The H-20 stealth bomber still hasn't made a public appearance, and it remains unclear where it will be tested. But the new southern hangars, with their unusually wide proportions, suggest the PLA expects to be testing aircraft with far wider wingspans in the not-too-distant future. [1]