On the basis of the bank safe deposit box lock, an intelligent passive anti-theft electric box lock has been redesigned. At the same time, a smart padlock was developed and piloted at the container terminal of Hutchison Huangpu, Hong Kong. The product has been sold to various logistics companies and customs in the following 2 to 3 years. There are several versions of this product, including a stand-alone version, and a GPS positioning host connected to the head of the container through a cable, which can be remotely monitored in real time. This version of the big padlock is an early IoT lock.