PTG cov nroj tsuag nyob hauv Mingxi, Sanming nroog ntawm Fujian xeev.Ua ke Beijing lab R & D muaj peev xwm, Fujian cog pilot thiab ua lag luam ua lag luam, peb tuaj yeem paub tsim cov txheej txheem tshiab los ntawm ob peb grams mus rau ntau pua tons.