How many congresses did CPSU hold?

Sue * * * a * * held twenty-eight congress.

1March 898, the first congress of the Russian Social Democratic Labor Party;

1July, 903, the second congress of the Russian Social Democratic Labor Party;

1April 905, the third congress of the Russian Social Democratic Labor Party;

1April, 906, the fourth Qin Congress of the Russian Social Democratic Labor Party;

May 1907, Fifth Congress of Russian Social Democratic Labor Party;

1965438+In August 2007, the Sixth Congress of the Russian Social Democratic Labor Party;

1965438+In March 2008, the Seventh Special Congress of Russia (Bolshevik);

1965438+in March 2009, the eighth congress of Russia * * * (Bolshevik);

In March, 1920, the ninth congress of Russia * * * (Bolshevik);

1921March, the 10th Congress of Russia * * * (Bolshevik);

1March, 922, the * * * (Bolshevik) th 1 1 th Congress of Russia;

1923 April, the 12th Congress of Russia * * * (Bolshevik);

1924 May, 13th Congress of Russia * * * (Bolshevik);

1925 65438+February, 14th Congress of the Bolsheviks;

1927 65438+February, 15th Congress of the Bolsheviks;

1June, 930, 16th Congress of the United Bolsheviks;

1934 65438+ 10, the 17th Congress of the Bolsheviks;

1March, 939, 18th Congress of the United Bolsheviks;

1952 10, the 19th Congress of the Soviet Union;

1February, 956, 20th Congress of the Soviet Union * * *;

1959 65438+1October, the 2nd1Special Congress of the Soviet Union;

196 1 year1October, the 22nd Congress of the Soviet Union * * *;

1March, 966, the 23rd Congress of the Soviet Union * * *;

1971March, the 24th Congress of the Soviet Union;

1February, 976, 25th Congress of the Soviet Union * * *;

198 1 26th Soviet congress in February;

1February, 986, the 27th Congress of the Soviet Union * * *;

1July 990, 28th Congress of the Soviet Union.