[I don't know exactly what is the cause of this. Perhaps a gas buildup in the man hole? The explosion is astounding. Don't get too excited about China. They're not as clever or as wonderful as the Jews crack them up to be. Jan]

Here’s the video:
https://www.scmp.com/video/china/3048386/4-injured-after-woman-throws-lit-fireworks-manhole-china-causing-explosion