What do you mean by "three cultures" in the spirit of the 20 th National Congress?

Develop advanced socialist culture, carry forward revolutionary culture and inherit Chinese excellent traditional culture. The 20th National Congress of the Communist Party of China（CPC） is a very important conference held at a critical moment when the whole Party and people of all nationalities in China are embarking on a new journey of building a socialist modern country in an all-round way and marching towards the goal of the second century. The theme of this congress is: hold high the great banner of Socialism with Chinese characteristics, fully implement Socialism with Chinese characteristics Thought in the new era, carry forward the great spirit of party building, be confident and self-reliant, be upright and innovative, forge ahead, and unite and struggle for building a socialist modern country in an all-round way and promoting the great rejuvenation of the Chinese nation in an all-round way.