Is it illegal for the intermediary to get the list of owners from the property?

This kind of behavior is illegal, because the information provided by the owner is kept by the property management company for convenience in the management process, and the property management company cannot provide it to others privately.

Legal basis:

Article 42 of the People's Republic of China (PRC) Public Security Administration Punishment Law shall be detained for less than five days or fined less than five hundred yuan for any of the following acts; If the circumstances are serious, they shall be detained for not less than five days but not more than ten days, and may also be fined not more than 500 yuan: (2) publicly insulting others or fabricating facts to slander others; (six) voyeurism, sneak shots, eavesdropping, spreading the privacy of others.

People's Republic of China (PRC) Civil Code

Article 1032 Natural persons have the right to privacy. No organization or individual may infringe upon the privacy rights of others by spying, harassing, exposing or making public. Privacy is the private space, private activities and private information that natural people live in peace and don't want to be known by others.

Article 103 Except with the express consent of the obligee, no organization or individual may commit the following acts: (1) Interfere with the private life and peace of life of others by means of short messages, telephone calls, instant messaging tools, e-mails, leaflets, etc. ; (2) Entering, peeping or photographing other people's houses, hotel rooms and other private spaces; (3) Shooting, recording, making public, peeping or eavesdropping on other people's private activities; (4) Shooting or peeping at the private parts of others' bodies; (5) Collecting and processing other people's private information; (6) Infringe upon the privacy of others in other ways.