It is called the fourth official because a game needs a referee and two assistant referees, and the role of the fourth official is "bottom".
According to FIFA's referee rules: only the identities of the referee and the fourth official can be interchanged, and the assistant referee and the VAR video assistant referee are not qualified to be referees. If the referee is injured and other emergencies, only the fourth official at the scene is qualified to take his place in law enforcement.
The referee list of FIFA World Cup Qatar 2022 in 2022 consists of 36 referees, 69 assistant referees and 24 video assistant referees. China referee Ma Ning served as the chief referee, and Yicao and Shi Xiang served as assistant referees.
The detailed list of 36 referees for the 2022 Qatar 2022 World Cup is as follows:
Asia (5 persons): Mohammed (UAE), Jassim (Qatar), Yamashita Ryumi (Japan), Faghani (Iran), Ma Ning (China).
Oceania (2 persons): Bis (Australia), Conger (New Zealand).
Europe (1 1): Marcigny Jacques (Poland), hibbert (Germany), Tourpin (France), Ferapas de (France), Marquelli (Netherlands), kovac (Romania), Vichy (Slovenia), Matthews (Spain), Osato (Italy), etc.
Africa (6 persons): Gulbar (Algeria), gassama (Gambia), Mukansanga (Rwanda), Gomez (South Africa), Ndiaye (Senegal), Sikazwe (Zambia).
North America (4 persons): Martinez (Honduras), Alvater (USA), Barton (El Salvador), Escobar (Guatemala).
South America (8 persons): Tello (Argentina), Raparini (Argentina), Klaus (Brazil), Sampaio (Brazil), Ortega (Peru), Ramos (Mexico), valenzuela (Venezuela) and Maronte (Uruguay).