1. In short? Siphon effect is the strong attraction of Guangzhou, Shenzhen and other big cities after the opening of high-speed rail, which makes it easier to absorb funds and talents from small cities along the high-speed rail, thus slowing down the development of these areas.

2. Space once hindered the population flow, but the convenience of high-speed rail shortened the time and space distance between cities and accelerated the population flow to cities with stronger economy and better foundation. As the population decreases, so does wealth.

3. Initially, it was predicted that the completion of high-speed railway and the strong development of big cities would promote economic growth. After the high-speed rail is opened to traffic, the agglomeration effect of core cities will be enhanced, and the population, economy, finance and income of third-and fourth-tier cities will be accelerated.

4. The strong will become stronger and the weak will become weaker. In other words, the winner takes all, and the competition will be more cruel. ? This is the Matthew effect in China's high-speed rail era.