(250514) -- CHANGCHUN, May 14, 2025 (Xinhua) -- This photo taken on April 25, 2025 shows Zhong Guangpei, an engineer at the Tianchi crater lake volcanic monitoring station, walking to a monitor spot on Changbai Mountains in northeast China's Jilin Province. TO GO WITH "Feature: Two decades of volcano monitoring in northeast China's Changbai Mountains" (Xinhua/Zhang Wenrong)


















