Lub Hoobkas PTG nyob hauv Mingxi, Sanming nroog ntawm Fujian xeev. Kev sib koom ua ke ntawm Beijing lab R&D peev xwm, Fujian cog sim thiab kev lag luam tsim khoom, peb tuaj yeem ua tiav kev tsim cov txheej txheem tshiab los ntawm ob peb grams mus rau ntau pua tons.