又找到一篇，用坦克送上去的

https://www.strategypage.com/militaryforums/69-26764-page3.aspx#startofcomments

12/13/2006 2:45:07 PM

Firstly China didn't ratify the CWC until 1997, so it was perfectly within their right to use chemical weapons in 1979.  Secondly, the weapon that was actually used in the war was tank delivered cyanogen chloride, not artillery or air delivered chemical munitions.  Furthermore, the usage of it was on tunnel networks within a few specific and isolated towns. Thus, the bulk of VA bunker and tunnel networks in the hill border regions was tackled with conventional artillery.  Which was rediculously difficult to take especially since the VA adopted slanted exposed bunkers.  I'll say this again, the PLA superiority in artillery was largely offset by the VA tunnel and fortification networks along the border.