By Yang Wentao and Zhu Qinliang
Engineering teams from all over of China have been working on the giant Hong Kong-Zhuhai-Macao Bridge project for over a decade.
Once completed, it will be the longest cross-sea bridge in the world.
Built to last for 120 years, it will link Hong Kong, Macao and the Chinese mainland.
Some of the engineers on the project have not seen their homes for years and in many cases, their children grew up without them.
This massive engineering project has become a part of their lives.
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