I'm not sure why, but the prospect of the Chinese building a military base in Pakistan reminded me of the Library building at my high school. We called it 'the Beaver Shot Palace'. Had we thought about, the 'Lick Library' would have worked too.
At this point it may be a bluff. The Chinese are "testing the waters" to see how tense things really are between Pakistan and the US. If things get worse and a "reset" doesn't occur though, it wouldn't shock me to see them actually follow through with it.