Seven people have been detained after being implicated in the scandal of the "house sister," a woman alleged to have illegally amassed 20 homes using multiple identities.

They will be subjected to criminal investigation for their suspected violations, according to a statement issued by the Ministry of Public Security on Wednesday.

Previous investigation found Gong Ai'ai, a resident in northwest China's Shaanxi Province, has at least two identities and hukou, Chinese household registration records.

Chinese netizens dubbed her "house sister" as she reportedly owns 20 homes worth a total of about 1 billion yuan (159 million U.S. dollars), some of which were purchased using her fake identities.