China's modern times are many disasters and difficulties, because the qing government's decay and incompetence fell into a war of nearly a hundred years, in this process our economy almost collapsed everywhere is a ruin, when New China was just founded, the country can be said to be in a state of ruin, basically need to rebuild, in order to enhance their comprehensive national strength as soon as possible, the mainland in the territory of China to build projects everywhere.

In this process, our workers have successively discovered some thousand-year-old tombs left over from history, and archaeologists will generally rush over as soon as possible to carry out protective excavations so as not to be destroyed by tomb robbers, but unfortunately, the work of archaeologists only lasted for a period of time, and then stagnated for more than ten years for some special reasons.
Until after the reform and opening up, it gradually recovered, in the last century, there was an engineering team inadvertently dug up a bottomless black hole, archaeologists came to the scene and said happily: the long-disappeared country finally found, what is going on, the engineering team dug out something, according to relevant information, these workers were originally just digging the foundation, in the process of work suddenly dug out a huge stone slab, this thing is very smooth, workers feel that there must be something underneath, so find a machine to hang it up, As a result, a bottomless black hole was found below.