Can a house shared by four people and friends taking drugs at home constitute shelter for others?

If you know that the other party is taking drugs in the house you rent and don't stop it, it belongs to allowing others to take drugs. As for whether it constitutes harboring others, it depends on whether it meets the standards of prosecuting others in the Provisions of the Supreme People's Procuratorate and the Ministry of Public Security on the Prosecution Standards of Criminal Cases under the Jurisdiction of Public Security Organs (III).

Provisions of the Supreme People's Procuratorate and the Ministry of Public Security on the Standards for Public Security Organs to Jurisdicte Criminal Cases (III);

Article 11 Whoever harbors others to take drugs or inject drugs is suspected of one of the following circumstances, and shall file a case for prosecution:

(a) allowing others to take or inject drugs for more than two times;

(two) allowing more than three people to take or inject drugs at a time;

(three) administrative punishment for allowing others to take or inject drugs, and allowing others to take or inject drugs;

(4) sheltering minors from taking or injecting drugs;

(five) for the purpose of making profits, allowing others to take or inject drugs;

(six) allowing others to take or inject drugs, causing serious consequences or other serious circumstances.