What are the characteristics of the old and new infrastructure in the government letter finance?

The traditional infrastructure in the government letter finance is mainly, repair roads, repair water conservancy, repair residential housing and other infrastructure or livelihood projects. But after all, it is infrastructure public welfare class, like housing projects such as this is a certain income, relatively speaking, there is a lot of security. "New infrastructure" is based on high-tech infrastructure construction, mainly including 5G infrastructure, ultra-high voltage, intercity high-speed rail and urban rail transit, new energy vehicle charging piles, big data centers, artificial intelligence, industrial Internet and other seven major areas ∞