▁co oper ations ▁and ▁dis sem in ates ▁public ▁ge os cience ▁knowledge ▁and ▁information ▁to ▁promote ▁the ▁sust ain able ▁development ▁of ▁China ' s ▁natural ▁resources . ▁The ▁CG S ▁also ▁works ▁intern ation ally ▁on ▁min eral ▁expl oration ▁and ▁ge ological ▁research . ▁About ▁ 2 8 % ▁of ▁the ▁CG S ▁published ▁research ▁is ▁in ▁collaboration ▁with ▁international ▁research ers , ▁which ▁is ▁compar able ▁to ▁that ▁of ▁the ▁United ▁States ▁Ge ological ▁Survey . ▁The ▁CG S ▁has ▁also ▁been ▁involved ▁in ▁environmental ▁research ▁in ▁China . ▁This ▁has ▁included ▁the ▁ 2 0 1 3 ▁find ings ▁that ▁ 9 0 % ▁of ▁Chinese ▁cities ▁had ▁" p oll uted " ▁ground water , ▁and ▁about ▁ 6 6 % ▁have ▁" se ver ely ▁poll uted " ▁ground water . ▁The ▁CG S ▁can ▁be ▁seen ▁as ▁part ▁of ▁China ' s ▁use ▁of ▁international ▁soft ▁power ▁as ▁it ▁attempts ▁to ▁gain ▁access ▁to ▁foreign ▁min er als . ▁ ▁Ge ological ▁par ks ▁ ▁China ▁has ▁ 4 4 ▁national ▁ge ological ▁par ks ▁managed ▁since ▁ 1 9 9 9 ▁by ▁the ▁Chinese ▁Ministry ▁of ▁Land ▁and ▁Resources ▁in ▁co operation ▁with ▁UN ES CO ▁to ▁find ▁a ▁way ▁to ▁protect ▁ge ological ▁sites ▁of ▁importance ▁while ▁encourag ing ▁both ▁tour ism ▁and ▁scientific ▁research . ▁Z hang j ia j ie ▁G rit stone - pe ak ▁Forest , ▁China ' s ▁best ▁preserved ▁cluster ▁of ▁vol cano es ▁and ▁ge ological