An old primary school building in Shanghai has been relocated to a new place.

The 85-year-old school that weighed 7,600 tons was moved to make way for a commercial and office complex. Engineers installed 200 mobile supports underneath the five-story structure, and they lifted the building off the ground. The supports acted like robotic legs and they were controlled by sensors to move up and down. The building was rotated and moved 62 meters over the course of 18 days.

It is the first time that Shanghai has adopted the largest walking-style building relocator in China. They enabled the building to reach the position while rotating in one attempt.

Difficult words: complex (a group of buildings or a building with several parts), mobile (movable), over the course (while something is happening), relocator (an equipment that is designed to transfer something to another place).