How does China Unicom open a virtual network?

5 yuan =500 minutes 10 yuan = 1000 minutes.

Free calls are only made in the same campus network, and cross-campus networks are 0. 1 yuan/minute.

20 yuan/month =300 Unicom +200 inter-network (mobile or Unicom)+100 minute local non-virtual network call +900 minutes virtual network+caller ID.

The campus network in the province is universal, and there is no cross-campus charge.

10 yuan/month =300 short messages in the network +200 short messages between networks (mobile or Unicom) +900 minutes of virtual network calls.