This is Beta version of the Chinese Campaign Mission 2. It Has different map layout, secondary object (suprisingly) and many other stuff, that we didn't have in the released version of Command & Conquer Generals Chinese Campaign
I've only edited a script, so you can't build a nuclear missile right away and nuke units.
Its just Beta version of the released version for Chinese Campaign mission 2
To play this Mission, click Solo Play and click on Custom Mission.
There you should see map named Workshop - China Beta Mission 2 , click on it and choose the difficult, then hit play.
Have fun with the Beta version of Chinese Mission 2