The Dyson ring of Tiantang is composed of thousands of space habitats and millions of solar satellites. Hosting billions of corvo and a few million inhabitants from other species, it is ever growing, and even more ships and bases are constantly being built with materials brought in from distant worlds. 
With unchecked growth in all directions, the sprawling Tiantang has become huge and chaotic. New freighters are attached to old ones by tunnels, which carry transport ships and everyday commuters. These improvised space habitats form communities called districts, of which Tiantang has thousands. 
Each district is completely detached from the others as it isn’t safe to create larger structures. Rich districts are often also isolated from the poorer ones. 
Districts are managed as a business (with residents considered assets) by different companies, who provide the equivalent of local government, and provide local services. 
Districts are a rich source of identity, with citizens typically forming identities on the companies, sponsors, products and entertainment available in their district. This phenomena was described by Aedan Baroqc as "Fashion Nations". 
Districts are grouped (by the hundreds) into ten sectors, plus the Capital Sector .
The lower classes are usually restricted to virtual entertainment and a diet based on fodder, insects rich in proteins, and compressed algae., plus the Capital Sector:
- Tiantang Capital Sector
- Union Sector
- Wang Sector
- Nation's Solution Sector
Each sector is managed by "overseeing boards" consisting of representatives from the companies running each of the districts.
While in the Corvosphere, you cannot forbid someone from moving and establishing in unowned space. However, empty areas between districts are completely owned by aggregations of citizens or corporations, making them private property and therefore allowing the owners to decide who can or cannot land there.
Transportation between districts is run by transportation companies, which have large fleets of spacecrafts. Middle and high class corvos own personal space cars that fill the vacuum between the districts like locusts.
Moving to another district - or moving cargo between districts - is prohibitively expensive for most citizens (although entirely affordable by Megacorps). This has the effect of restricting the growth of small and medium enterprises, whilst ensuring the economic dominance of the megacorps. 
Middle class citizens live in comfortable, safe and beautiful districts, composed of a single spacecraft called a gyro-zhan. Gyro-zhans are round spacecrafts that spin continuously to recreate a sense of gravity through centrifugal force. Several thousand corvo live in each of these stations
The middle class usually travels once or twice per year to a tourist colony and enjoys the entertainments available in Tiantang the rest of the time: they can eat out several times per year, but mostly eat algae kunbu and other food products that can grow in space. Gyro-zhans have tanks of algae used both as food and energy source. The algae is fed with organic waste, imported minerals and sunlight.
Middle class citizens living in gyro-zhans are known as G-Tian.
Most of the population live in space freighters, which are better known as space slums: old space freighters the size of islands, now too old to be operational, have been transformed into slums where layer over layer of containers extend as far as the eye can see, each housing one or more families, and all of them living in 0-G in the worst possible conditions. Most families live and die in one of these containers, without ever experiencing gravity. Their bodies are kept alive thanks to the intake of G-pills that minimise the effects of the lack of gravity on their organs. Their only chance of a better life is being seen as a capable worker by their foremen, and getting a proper job in a gyro-zhan.
Many resort to crime. The worst districts are controlled by mafias (Tongs) who decide who gets to work when, and on what. While there is almost no crime whatsoever in the richer districts, the majority of the lower class corvos are unable or unwilling to pay for police protection. Therefore, there are millions of corvo that live in the slums without even the most basic of services.
Some with even worse luck live in the same factory ships they work on every hour they are awake, building new ships or satellites, fabricating weapons, anti-matter batteries, or operating food processing chains, pharmaceutical processes, etc.
The lower classes are usually restricted to virtual entertainment and a diet based on fodder, insects rich in proteins, and compressed algae kunbu.
In Tiantang, the upper class can eat and enjoy anything they can imagine.
The wealthiest Corvo own and live on palaceships.
Immigrant corvos arrive by the thousands every day and are sucked into the space slums. While the demand for workers is huge, there are now so many workers that the companies can offer low wages knowing that there will always be someone desperate enough to take the job. This has drastically reduced the quality of life of corvo workers in Tiantang.
Veteran workers see how their well paid jobs are being taken by inexperienced immigrants from Quanjie or from some other colony, who agree to a tenth of the salary. This has created large scale problems of xenophobia, and groups of Hexia and Ergon believers have teamed up to ask for a more protectionist state and stronger immigration laws. Still, the lobby groups of the megacorps and the vast majority of the population are completely against such ideas, and therefore the situation isn’t likely to improve.
Iz’kal geniuses disenchanted by their conservative and not-merit based society move to Tiantang to try to earn the patronage of a megacorp for their inventions and theories. The corvo have the resources and open mind to make anything possible happen, for as long it makes them back their investment and then some, of course.
All items (45)
- Taiyang Sector
- The Union Sector