The five certificates/permits are designed and requlated by the Chinese governement to property developers. Developers need to obtain these certificates/permits before they can officially launch sales.

They include: Construction Permit, Land Certificate, Construction Use Land Planning Permit, Construction Project Planning Permit, and Presale Permit.

Anywhere but Taiwan (R.O.C.).

It is similar to the hotel star rating system. 5A office building refers to the intellectual '5As', which includes:
1. OA: abbreviation of Office Automation
2. CA: abbreviation of Communication Automation
3. FA: abbreviation of Fire Automation
4. SA: abbreviation of Security Automation
5. BA: abbreviation of Building Automation
Therefore, the '5A' does not stand for quality. And the wording of 'super 5A' is but extremely unprofessional. 

People's air defence stands for 'air-raid shelter'.

It is a common term for office building without a fixed standard. After all, no one wants to be called a 'Grade B office building'.

1. There are different regulations in each province. According to the law, it is deemed to have taken place after the title deed is received.

2. In Nanning and Shanghai, a presale property is purchased when deed tax is paid and deed tax receipt is obtained. The time of paying deed tax is when the first progress payment is made.