In addition, as people at the top level of the party retire, there is room for younger members of the party to move up one level. Hence the party congress is a time of a general personnel reshuffle, and the climax of negotiations that involve not only the top leadership but practically all significant political positions in China. Because of the pyramid structure of the party and the existence of mandatory retirement ages, cadres who are not promoted at a party congress are likely to face the end of their political careers.