underground works

When it comes to underground works, even a world or an underground community, we often associate with ancient civilizations, which are somewhat distant in the past.

So far, the tomb of Qin Gong No. 1 is the most recorded grave in China: The largest grave in the area: 5,334m2; there were many people buried in the tomb from the West Chu life:

Hundreds of meters long corridors, large beams, many areas are continuing to be dug deep ... all make a bustling construction site in the heart of Ho Chi Minh City.

Underground nuclear facility 816 in Chongqing Province, China reopened after a year of renovation.

Many giant buildings hidden deep underground make all visitors overwhelmed by their magnificence.