- we know that there was lots of information about what was discovered by the Chinese earlier this year under the Great Wall
- we know there was lots of information about China's plans and timetables for the future (no idea of the contents of these)
- we know that the Chinese will consider it an act of war if anyone tries to knock out the antenna thing that is transmitting

- we are told that the Chinese couriered the briefcases to their respective embassy destinations on the 28th July.
I reckon it is logical to assume that the Chinese have made good use of the time since then to strengthen whatever position they decided to take in relation to all this.

Also, I don't think that it is a coincidence that China's new lunar probe is where it was on October 13th when the cases were opened.