The two topics refer to the two historical topics that the Party's construction faces, which were put forward by the 15th National Congress of the Communist Party of China. One is to constantly improve the level of leadership and governance, and the other is to improve the ability to resist corruption and change and resist risks. To improve the party's leadership level, we must first improve democratic centralism according to the characteristics of the ruling party and make it democratic and procedural. The two topics of expanding information refer to two historic topics faced by the Party's construction, one is to constantly improve the level of leadership and governance, and the other is to improve the ability to resist corruption, change and risks. To improve the party's leadership level, we must first improve democratic centralism according to the characteristics of the ruling party and make it democratic and procedural.