According to
http://irexreader.cn/bbs/viewthread....extra=page%3D1,
China version iLiad is also reflashable, once it gets developer package. It is reflashed from Europe version iLiad rom image (the "cf-card-contents.zip" downloaded from Eruope iDS). Then making iLiad connect to China iDS will upgrade iLiad to up-to-date China version OS. If connected to Europe iDS, iLiad will be upgraded to up-to-date Europe version OS.
If the above is true, what joyceshi reluctated to reveal is quite easy,
once developer package is installed. I will be astonished only if she (or he) did this without installing developer package beforehand.
So,
it seems that Europe version iLiad can be changed to China version OS. The workaround is reflashing by using Europe version OS image, then upgrade to up-to-date China version OS by redirecting iLiad to China iDS instead of Europe iDS. Then iLiad's OS is changed to China version. Users can obtain developer package just as a normal China version iLiad by redirecting to Europe iDS.