Self serving for control
If Beijing sticks to a nice low number like 144 the service won't be useful beyond the Middle Kingdom
But they are perfectly aligned with the great firewall. Target is internal networking, not external. People will already have access to most of anything once they are stationed outside the firewall's, hm, country's borders. China's birds will make enforcing a domestic ban on any foreign satellite connectivity easier while providing a local and controlled system inside the firewall.