What is the conversation mainly about?

W: Do you like sports?
M: Yes, especially volleyball.
W: Really? Do you know when volleyball was introduced to China?
M: Well, it was introduced to China as early as 1910. Do you know when volleyball became an official game in the Olympics?
W: I am not sure. Can you tell me?
M: I think volleyball made its first demonstration in 1924 at the Olympic Games in Paris. And the International Olympic Committee made the game a non-Olympic sport in 1949. (2)It was not until 1964 that the first Olympic volleyball tournaments were played in Tokyo.
W: So it took four decades to have volleyball to become one of the official games in the Olympics. Can you tell me how many players are there in a team?
M: Volleyball was invented to be played by a number of players. However, the rules were modified many times. In earlier days, teams were made up of 16 players, and later the number of players on the court again became varible—being anything from 2 to 6 for each team.
W: Did all the rules of the game finally become unified? How about the Olympic Teams?
M: Yes, the rules were unified. (3) The number of the players on each team was set at 6.