"My neighbor installed a camera opposite my door" Expert: Suspected of privacy invasion. "The neighborinstalled a cameraosite my door." The camera smart door lock takes the corridor into the camera and triggers the recording function as soon as the neighbor opens the door.

"I feel like a thief when I go in and out of my house," said Ms. Liu, a resident of Jizhou District, Tianjin. "My child is often home alone, so I installed smart door locks to ensure his safety," said Grandma Li.