Yongjin - Tshuab ua ntaub zoo tshaj plaws, tshuab luam ntawv, tshuab siv ntaub thiab tshuab xaws YJ-NF 4/66
Peb muab cov tshuab ua ntaub zoo tshaj plaws, tshuab luam ntaub, tshuab siv ntaub thiab tshuab xaws uas ua tau raws li qhov xav tau ntawm kev lag luam tshiab thiab ua tau raws li qhov zoo tshaj plaws thiab kev nyab xeeb kom ntseeg tau tias muaj kev txhawb nqa ntev, ruaj khov thiab ua haujlwm tau zoo. Cov no yog siv rau hauv kev tsim khoom txhua hnub thiab kev tsim khoom thiab yog qhov xav tau rau txhua lub lag luam.