What is the fireworks on Xiaomi's door lock?

The fireworks on Xiaomi's door lock is a network stalk, which originated from the advertising video of Xiaomi's smart door lock. In the advertising video, someone blasted a small hole in Xiaomi's smart door lock with fireworks, then reached into the door through the small hole and finally opened the door lock. Advertising creativity is relatively novel, attracting a lot of people's attention and discussion.