What is the mushroom cloud phenomenon in Beijing?

On June, 2065438 14 19, a "mushroom cloud" appeared over Beijing, accompanied by lightning. This beautiful scenery has attracted many photographers and citizens. Many photographers uploaded pictures of Beijing Mushroom Cloud to the Internet. Soon, these pictures of Beijing mushroom cloud were madly reprinted by netizens.

This cloud is a typical upward cumulonimbus cloud. Some cumulonimbus clouds will still develop into larger clouds after heavy rain, but some cumulonimbus clouds will also develop into cumulonimbus clouds in the afternoon.