Who knows the chain owner and chain length of the industrial chain?

Modern industrial chain is different from traditional industrial chain, and it has stronger flexibility and diversity. The enterprises in the industrial chain nodes are all-round cooperative relations. Modern industrial chain can be divided into "chain owner" and "chain length". "Chain owners" are different enterprises in the industrial chain, the product of spontaneous formation of the market and the trend of interests. In the industrial chain, they will use their own advantages to eliminate other industries. The "chain length" is the leader and maintainer of the industrial chain, often held by the government or other large state-owned enterprises with demonstration and discourse power, and leads the industrial transformation and upgrading through industrial policies and their own strength.