Ho tloha bohareng ba Phupu, e ts'ehetsoeng ke letoto la lintlha tse ntle tse kang ho lekanyetsoa ha matla a tikoloho le tlhokomelo ea lisebelisoa, 'maraka oa lehae oa calcium carbide o ntse o phahama. Ho kena ka Loetse, ketsahalo ea ho laolla literaka tsa calcium carbide libakeng tsa bareki North China le Central China e etsahetse butle-butle. Litheko tsa ho reka li 'nile tsa tsoela pele ho fokotseha hanyenyane' me litheko li theohile. .
