If the crime of opening a casino is serious, it shall be deemed as: 1, and the total profit from tapping reaches more than 30,000 yuan; 2, the amount of gambling funds accumulated to more than 300 thousand yuan; 3. After the establishment of a gambling place, the illegal income is more than 30,000 yuan by providing it to others to organize gambling; 4 to participate in the profit sharing of gambling places, and the amount of illegal income is more than 30 thousand yuan; 5. Other circumstances. Legal basis: Opinions of the Supreme People's Court, the Supreme People's Procuratorate and the Ministry of Public Security on Several Issues Concerning the Application of Laws in Handling Internet Gambling Crimes 1. If the acts specified in the preceding paragraph are under any of the following circumstances, they shall be deemed as "serious circumstances" as stipulated in the second paragraph of Article 303 of the Criminal Law: (1) The total amount of tapped profits has reached more than 30,000 yuan; (two) the amount of gambling funds reached more than 300 thousand yuan; (3) The cumulative number of gamblers has reached more than 120; (four) after the establishment of a gambling place, the illegal income is more than 30 thousand yuan by providing it to others to organize gambling; (five) to participate in profit sharing in gambling places, and the amount of illegal income is more than 30 thousand yuan; (6) Recruiting a subordinate agent for gambling sites, and the subordinate agent accepts bets; (seven) to attract minors to participate in online gambling; (eight) other serious circumstances.