Legal analysis: Married couples are local and can only buy two suites, while single couples can only buy one suite, and they also need to provide single certificates. If it is a foreign household registration, it is necessary to provide local social security payment records for more than 5 years, and there can be no gaps in the middle, otherwise it will be invalid.

Legal basis: Article 209 of the Civil Code of People's Republic of China (PRC) establishes, changes, transfers and extinguishes the real right of immovable property, which will take effect after being registered according to law; Without registration, it will not take effect, except as otherwise provided by law.