Institution is the key to the establishment of a country. A stable institution means a stable country, and a strong institution means a strong country. further deepen reform in an all-round way, we must adhere to institutional construction as the main line. General Secretary Xi Jinping emphasized that "insisting on institutional construction as main line, we should strengthen top-level design and overall planning, take both reform and innovation, establish before abolishing, consolidate the fundamental system, improve the basic system, innovate important systems". This important exposition flashes the ideological wisdom of materialist dialectics, and provides the fundamental guidance for the institutional construction in the new era. On the journey, only by persisting in the coordination of top-level design and grass-roots exploration, the establishment of new systems and the abolition of old systems, and the combination systematic advancement and local breakthroughs, can we ensure that institutional construction meets the requirements of the times and promotes social development, and lays a solid institutional foundation for promoting Chinese-styleization.

1. Synergy between Top-level Design and Grassroots Exploration
"Feeling one's way across the and enhancing top-level design are dialectically unified. The promotion of local and phased reform and opening-up should be carried out under the premise of enhancing top-level design and enhancing top-level design should be planned based on the promotion of local and phased reform and opening-up." Starting from grassroots exploration to accumulate experience for top-level, and then guiding new grassroots practice with top-level design. The virtuous interaction between top-level design and grassroots exploration embodies the contradictory transformation movement of "special——special", follows the cognitive development law of "practice—cognition—practice", demonstrates the organic combination of the leading power of the Party and the main power of the in institutional construction, contains the leading method and work method of the Party's mass line of "from the masses, to the masses", and is also an important method of construction in the new era.
The combination of top-level design and grassroots exploration is the historical experience bred by reform and opening-up. The history of reform and openingup is also the history of interaction and evolution between top-level design and grassroots exploration. At the beginning of reform and opening-up, the bold exploration of contracting production to households Xiaogang Village, Anhui Province was recognized by the central government, and the "big contract" was upgraded to the family-based household contract responsibility system and popularized the country in the form of the central document No.1; the secret of the metamorphosis of a small fishing village in Shenzhen into a metropolis is the to take risks and experiment, and local experience has promoted the development of China's reform and opening-up from point to line, from line to surface. The accumulation of practical has pushed top-level design onto the track of institutionalization, and the virtuous interaction between top-level design and grassroots exploration has promoted China's economic and social development achieve remarkable achievements. Since the 18th National Congress of the Communist Party of China, the deepening of reform in an all-round way has endowed grassroots exploration and toplevel design with brand-new contemporary connotations. A series of practical explorations such as free trade pilot zones, pilot reforms of the national supervision system, pilot reforms of the judicial, etc., have accumulated valuable experience for top-level design and promoted the reform from easy to difficult, from small to large.