Su Dike captured these purple-tinted thunderstorm clouds near Xibohua town in Tongliao, North China’s Inner Mongolia autonomous region, on Aug. 20, 2021. Photo: Su Dike

A pileus appears above a cumulus cloud in Hangzhou, East China’s Zhejiang province, on July 6. Photo: Su Dike

A puffy cumulus grows as a thunderstorm develops in Baicheng, Northeast China’s Jilin province on July 10. Photo: Su Dike

An arcus cloud dominates the sky of Hangzhou on June 29. Photo: Su Dike

The sun lights up a turbulent cloud after squall lines appear in Tongliao on June 17, 2021. Squall lines are thunderstorms organized in a linear formation, which usually form in unstable atmospheric environments. Photo: Su Dike

Su captured this classic supercell in Xilingol League in North China’s Inner Mongolia autonomous region, on June 4. Photo: Su Dike

Mammatus clouds cover the sky in Xilingol League on Sept. 12, 2021. Photo: Su Dike

Mammatus clouds are formed in Xilingol. Photo: Su Dike

Su and his teammate try to capture a supercell in Xilingol. Photo: Su Dike

A supercell wall cloud appears in the sky of Shuangliao, Northeast China’s Jilin province, on Aug. 24, 2021. Photo: Su Dike

In June 2021, Su drove 400 kilometers to chase a storm and captured lightning strikes near Cangzhou, North China’s Hebei province. Photo: Su Dike

A double rainbow appears in Hangzhou on June 17, 2021. A double rainbow occurs when sunlight gets reflected twice in raindrops. Photo: Su Dike

Su began to record extreme weather events in China in 2019 when he chased Super Typhoon Lekima in Zhejiang province. For more than three years, he has traversed 12 provinces across the country with a total travel distance of nearly 40,000 kilometers (24,854 miles). Photo: Courtesy of Su Dike