Clear boundary signs are set around, in which the 2-meter meter line is usually called the "2-meter restricted area", which is the boundary when judging offside, serving a corner kick, punishing a defensive foul in the 2-meter restricted area and the goalkeeper pitching.
The 5-meter line is usually called the "5-meter forbidden area" and is the boundary of the 5-meter direct free kick. The penalty kick is an indirect free kick outside the 7-meter line, and the penalty player's direct shot at the 7-meter line is valid. At the corner of the end line of the stadium, circle the athlete's position and the designated area where the athlete enters and exits the stadium with red waterline or mark.
History of water polo development
Water polo, also known as "water football", is a collective ball game that combines swimming, handball and volleyball in the water. Water polo pays attention to strength, courage and teamwork, and requires both teams to swim and grab the ball at the same time, and strive to shoot the ball into the other team's goal to score.
Water polo originated in England in the middle of19th century. At first, it was an entertainment when people threw football into the water while swimming, and later it gradually became a competitive water polo sport between two teams. 1877, the British Burton Club hired Wilson to formulate the world's first water polo competition rules.
1885, the British Swimming Association listed water polo as a separate event. Men's water polo was listed as an official event in the 1900 Paris Olympic Games, and women's water polo was listed as an official event in the 2000 Sydney Olympic Games. Water polo has been an official event since the Asian Games in New Delhi in 195 1.