Among all the delegates to the congress, the number of workers saw the sharpest increase, from 51 in the 17th congress to the current 169, including 26 migrant workers.
They work in a variety of factories in the industrial sector, such as as mining, steel and machinery factories, and they hold a variety of positions in the service sector, including those involved in transport, utilities, sanitation, financial business and trade.
Also, grassroots delegates include rural teachers, village doctors, farmers as well as village Party officials.
Female delegates account for 23 percent of the total and ethnic minorities account for 11 percent.
According to established practices, the CPC Central Committee will also invite some Party members who have retired from their leadership posts as special delegates to the congress, Wang said.
"The makeup of delegates is appropriate and all ratios set by the CPC Central Committee to realize full representativeness have been fulfilled," he said.
The 2,270 delegates, elected by 40 electoral units, will represent more than 82 million CPC members in attending the 18th CPC National Congress, which is scheduled to be held in the second half of this year in Beijing.
According to the criteria set by the CPC Central Committee, delegates to the national congress should have firm faith and a correct political stance. They should also be morally upright, excellent at their work and qualified for their duties, Wang said.
Landmark building should respect the public's feeling