Geopolitical analysis of satellite pictures taken between 2022 and 2026 revealed the expansion of secret nuclear sites in China's Sichuan Province, New York Times reported. While the facility at Zitong valley shows new bunkers and a rampart, refurbishment can be seen in Pingtong valley's site. Intelligence expert Renny Babiarz, said, "Broadly speaking....change accelerated starting from 2019."