There is a training class in Shijiazhuang to learn how to repair zippers and spikes with keys. It is called Shijiazhuang Unlocking Training School, and its main business includes learning and training of unlocking technology and maintenance and installation of locks.

Shijiazhuang unlocking training school is a regular unlocking training school in Shijiazhuang approved by the Industrial and Commercial Bureau and filed by the Ministry of Public Security.