President Xi Jinping on Tuesday said the Chinese Communist Party always opens its door to young people and warmly welcomes them to become the fresh blood of the party.

Xi made the remarks at a ceremony in Beijing marking the centenary of the Communist Youth League of China (CYLC).

Xi said party organisations at all levels should attach great importance to the cultivation and development of young members to ensure that the socialist country will never change its nature.

"On the journey to realise the national rejuvenation, the Communist Party is the vanguard team, the CYLC is the attacking team and the pioneer team is the preparation team," he said.

"To first enter the pioneer team and then the Communist Youth League of China and then finally to become a member of the party... the Communist Party always opens its door to the young generation and warmly welcome the young generation to become the new energy to the party." (Additional reporting by Xinhua)