Acetylene is an excellent fuel for China and the developing world for the same reasons it was once popular in the US. Calcium carbide is easy to produce when you have cheap hydro-electric power, coal, and lime. It's an "energy storage medium". You don't need electrical power to USE it, you can heat with just an air-acetylene rig, and carbide keeps fairly well.
US acetylene generator company Rexarc (a very old outfit, once "Rego") sell acetylene plant including old-school generators worldwide: