What does "Unicom mixed reform" mean?

As follows:

Mixed reform is the mixed ownership of state-owned enterprises, that is, private (unofficial) capital is added to state-owned holding enterprises, making state-owned enterprises become multi-share enterprises, but they are still dominated by state-owned holding enterprises to participate in market competition.

The purpose of mixed reform:

First, in order to make the national communication policy more consistent and effective, it must be standardized; Secondly, subsidies are used to solve the cost problem of bat network coverage in remote areas in the future; Third, even with supervision, the combination efficiency of bat+ China Unicom will be much better than China Unicom itself.

In addition to the above, the country actually has a good move. After the mixed reform of China Unicom by Bat, it will improve the efficiency of China Unicom and make it grow sturdily, which will bring great pressure to mobile telecommunications, forcing it to reform itself and level the gap. Canada's private railways and public railways are the most striking examples. After years of reform, the conclusion is that there is no obvious difference in efficiency between the two systems. The competition between the two provides a powerful efficiency incentive for each other.