Kwv yees li 6,000 xyoo dhau los, cov Sumerians tau pom ib qho dej cawv uas tau nrov thoob ntiaj teb: npias.Txhawm rau kom tswj tau qhov sib xws ntawm qhov tsw, freshness thiab zoo ntawm npias, cov txheej txheem membrane pom thaum lub sij hawm brewing yuav tsum ruaj khov kho cov kab mob, cov organic teeb meem, qhia meej, thiab saj zoo dua.Dongguan Qinda muaj 18 xyoo ntawm txoj kev loj hlob thiab kev tsim khoom, ua ke nrog lub chaw soj nstuam tuaj yeem muab cov kev pabcuam microbial thiab pov thawj, kom ntseeg tau tias kev ruaj ntseg thiab kev ua haujlwm ntawm cov khoom muab.
