I share here a few advises about this.
Buying a new appartment in China
You must pay 30% of the total price and 50% for the second appartment you buy. As a foreigner in China, you must pay 100% of the total price.
A Chinese national can get a credit for 30 years and pay each month.
However note, that it is better to ask for the credit at the beginning of the year. At the end of the year, banks don't have anymore budget! And with the inflations, credits are reevaluted each year.
At Changsha realestate price are already high: 15 000 to 20 000rmb for one m2 in the city center, 10 000 in the close suburb and 5 000 rmb in the suburb. Chinese cities are huge. While city center and nearby suburb are built, suburbs have many vacant space available for new constructions (empty field, empty hill...). That is why, currently it is probably not a good idea to invest in an appartment in the suburb. Price will go down. In the city center and in the nearby suburb, real estate price stabilize and maybe go down a little bit?
Buying an appartment to rent it, is not a good idea. In fact the leasing market is saturated.
Decoration of a new appartment in China
For the decoration of a new appartment you need to find a decoration team.
The best is to ask several decoration team for some quote and compare the price. You should also look at the experience fo the team: they decorated other appartments in the same building? they work for a decoration company?
You should prepare a detailled list of the work you want to be done. If you add extra work later on, it could cost you a lot more.
It is better to buy the decoration material yourself rather than ask the decoration team: pipes, floor, electric wires, doors... This allows to save money and make sure about the quality of the material! The decoration team will give you a list of materials to buy. However you should be ready to search in the different decoration material markets, compare price, negociate, avoid counterfeit materials, cheats...
If you have a limited budget, you can do a few big work yourself for instance: break walls.
Breaking the appartment walls
Beginning of the decoration work