What is the "pig cage village in the city" in Shanghai like? Why is it listed as an immovable cultural relic?

I believe most people have seen the movie Kung Fu starring Stephen Chow, and its main shooting location is a dilapidated pig cage village. The prototype of Zhulongzhai City is the famous Kowloon Zhai City in Hong Kong, which can also be said to be a slum in the 1990s. With the development of the times, I believe that there are few places like the village in the pig cage, but there are exceptions to everything. For example, there is still a relatively complete pig cage village in Shanghai, and there are still people living in it. This pig cage village in the city is Longchang Apartment in Yangpu District, Shanghai.

This Longchang apartment was built in the 1930s, but it was designed and built by the British at that time. It was mainly used as a patrol room. After so many years, the bar built by the prisoner was still preserved. After the founding of New China, this police patrol room was used as staff quarters by the local public security bureau, which is also the origin of the name Longchang Apartment. Slowly, people think the environment here is very bad, so most people move out. Later, many people moved in because the rent here was very cheap.

In this Longchang apartment, a * * * has 250 rooms, each building has four floors, and there are corridors between each building, just like a tube-shaped building. It was because of the 2004 movie Kung Fu that this Longchang apartment in Shanghai became a fire. People punch in here every day, and even the crew often come here to take pictures. Apart from buildings, this Longchang apartment was the first place in China to use tap water and gas at that time.

Over the years, Longchang Apartment has become incompatible with the surrounding buildings, but it is this incompatibility that makes it stand out from the crowd. It has a slow life different from the city, more like a harbor than a fast-paced city life. Longchang apartment was listed as an immovable cultural relic in 2004, and the government renovated it in 2005.