The fluctuation has nothing to do with position. Listed companies in Shanghai stock market are all big blue chips, accounting for more than 70% of the total circulation of the two cities, which directly affects the economic trend. Small and medium-sized boards are everywhere in Shenzhen. If the small and medium-sized board is active recently, then the Shenzhen stock market may fluctuate greatly. If banks, steel, oil and other super-large blue chips are active recently, then your E-Key 50 will also be active.