According to the Constitution of CPC adopted at the 15th CPC National Congress, "the election of delegates to committees and Party congresses at all levels must embody the will of the voters. The method of election is by secret ballot. The lists of candidates shall be carefully considered and discussed by Party organizations and voters. The method of multi-candidate election may also be adopted to produce a list of pre-selected candidates, from which actual candidates will be formally elected at a later time.
In strict accordance with the principles of the Party's Constitution, the election of the delegates to attend the 16th National Congress is made by way of multi-candidate elections. The number of candidates in attendance is usually 10 percent more of the number of delegates to be elected.