A total of 2,280 delegates from all walks of life will attend the 19th National Congress of the Communist Party of China, which starts on Wednesday.

The Party elected 2,287 delegates before the Congress, but seven of them did not pass the final review by the delegate credential committee. "The qualification of the 2,280 delegates is effective," Tuo Zhen, Congress spokesman, said on Tuesday.

The qualified delegates are from various sectors, including the economy, education, health and justice, and are from all levels of society. For example, 33.8 percent of the delegates come from grassroots departments, 3.3-percentage points higher than the figure of the last Congress, according to Tuo.

Of the delegates, 8.7 percent are workers; 3.8 percent are farmers and 12.4 percent are technicians, he said.

Meanwhile, the number of female delegates and those from ethnic groups have been respectively going up, and more than 70 percent of the total delegates are younger than 55, he said.

In addition, a majority of the delegates joined the Party after the country's reform and opening-up, he added.