【Haichuan Chemical Industry Site】The “Super Nitrate Production Factory” at Han Kui Men in Fengjie, Chongqing”
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On a hidden cliff deep in the mountains of Chongqing, there is a strange cave; it was only after exploration by an expedition team that it was discovered that inside lies an ancient \"super nitrate production facility\". This mysterious cave is located in Han Kui Men, Fengjie County, Chongqing. Han Kui Men is located in the Three Gorges region; it is also an important part of the karst landscape, featuring numerous cliffs and precipices as well as natural caves of various sizes. Because of the rugged terrain here, basically no one has come to this place for over half a century. Yet it is in such remote places that many unknown secrets often lie hidden. That is precisely why scientific exploration teams want to come here to find out more. And I will also, based on the activities of this expedition team, lift the veil of mystery surrounding this “super nitrate production facility” hidden deep in the mountains.
After crossing the river, the explorers had to climb slowly up the steep cliff ahead for about 200 meters, before entering a cave in the cliff face to reach this mysterious salt and nitrate cave. There, they found that the cave was extremely large; using instruments, they estimated that its height was over 300 meters
Walking a few hundred meters further in, one can find clear remnants of nitre production. Within the caves, not only are there the ponds used for this process, but also in the river valleys, there are scaffolding structures needed for hanging the nitre. In addition to the tools needed for nitrate production, many items left behind by ancient people were also found, including stone stoves and stone beds. Speaking of this, many people may still not know what exactly is involved in the process of producing nitre. In fact, nitrate is one of the raw materials used in manufacturing **. Moreover, apart from being used to extract the nitrate needed for manufacturing **, Ao nitrate can also be used to produce salt.
Although, from the perspective of today’s technological standards, this method of producing nitrate by hand is a very backward way of production, it was in ancient times a means for farmers to make a living. With the success of this exploration, the identity of this mysterious cave hidden deep in the mountains of Chongqing has finally been revealed—it is an ancient \"super nitre production facility\". The explorers found many complete tools used for nitre production, as well as remnants of such production processes (nitre ponds, hanging racks, etc.) in this dark cave. With a height of about 300 meters and a width of around 70 to 80 meters, this cave is likely to be the largest site related to nitre production that can be found in Chongqing. But after all, our country has such vast landscapes – how many more unknown secrets await us to discover?