What is this wonderful gloom in China? (3 photos + video)

There are a lot of beautiful and futuristic skyscrapers in China. And this huge dominion is clearly not one of them. The building looks gloomy and even abandoned. But no. More than 800 people work there. And what a stench there is... horrible. And someone is constantly screaming. So what kind of place is this?

So, in front of you are two huge "pig scrapers" - this is the largest pig farm in China, where over 1.2 million heads are raised. Inside there are tens of thousands of pens, automatic feeding, climate control and round-the-clock monitoring. By the way, pig manure is processed into biogas, which is used to heat and power the complex itself.