[Toryin]

1. It looks like several of the AI(s) are missing colonial development in their research tree. Hence when they get to a stage that the planets are supposed to build a mineral/organic/research/etc modifier such as minor city, the only thing to build is a Cultural Center.

One AI with this problem for example is:
XiChung_AI_Research.txt
XiChung_AI_Construction_Facilities.txt

I'll test this later to see if it fixes the problem.