Which democratic rights is the chinese government is trying to get rid of by pre-screening candidates for the position of Chief Executive?

Through its prior delimitation of the candidates for Chief Executive, the government of the People's Republic of China limits the right of its citizens to the free election of their representatives. In other words, it previously delimits this right, prohibiting its citizens from choosing candidates who do not belong to the Communist Party, with which their decision-making power is severely limited. This situation directly attacks the concept of democracy, which implies the free and unrestrained election of representatives by the citizens of a country.