If you are referring to the "China Inferno" files associated with , specifically in the context of the popular Contra or Shockwave mods, Core Gameplay & Mechanics
Extract the contents of the .zip file into your main Command and Conquer Generals Zero Hour directory (often found in C:\Program Files (x86)\EA Games\... or your Steam folder). CHINA_INFERNO_Eng.zip
While slower than the Inferno Cannon, it provides massive long-range damage ideal for breaking entrenched defenses. If you are referring to the "China Inferno"