There are seven events in World Table Tennis Championships, namely: men's team, women's team, men's singles, women's singles, men's doubles, women's doubles and mixed doubles. 1926 was first held in London, England in February, and it was changed to be held every two years from the 25th session of 1959. 1926 12 At the same time that ITTF was formally established, the first world table tennis championship was held in London, England. The powerful Hungarian team won all the championships in men's team, men's singles, men's doubles, women's singles and mixed doubles. 1928 The second World Table Tennis Championships added the women's doubles competition, 1933 added the women's team competition. The World Table Tennis Championships are held once a year from 1928 to 1939, 1947 to 1957. Since the 25th session of 1959, it is held every two years. After the 47th World Table Tennis Championships (2003/2004), it was officially changed to an odd-numbered single event and an even-numbered team event (but counted as one session). Rules of the World Table Tennis Team Competition: 1. The competition method of the World Table Tennis Men's Team Championship (Swislin Cup). Each unit can submit 5 contestants, and both sides can choose 3 contestants. The competition adopts the best-of-nine system (the best-of-three system is adopted in each game), and the winner is the one who wins five games first. Before the game, the two sides selected the home team and the visiting team by drawing lots. 2. Three players of the home team are designated as A, B and C; The three players of the visiting team are designated as X, Y and Z, and the order of the nine games is: 1A to X2B to Y3C to Z4B to X5A to Z6C to Y7B to Z ⑧C to X ⑨A to Y.3. For the women's team championship of the World Table Tennis Championships (Columbus Cup), each unit can submit four players to participate, and both sides can choose two from each game. The game adopts the best-of-five system (also adopts the best-of-three system in each game), and the winner is the one who wins three games first. Before the game, the two sides selected the home team and the visiting team by drawing lots. The players on the home team list 2 are designated as A and B; The two players of the visiting team are designated as X and Y, and the order of the five games is: 1A versus X2B versus y3 doubles 4A versus Y5B versus X.