ph oe ) ▁of ▁Ro i ▁Et ▁Province , ▁Th ailand . ▁ ▁Geography ▁Ne igh bor ing ▁districts ▁are ▁( from ▁the ▁north ▁clock wise ): ▁Pho ▁Ch ai , ▁Sel aph um , ▁Th aw at ▁B uri , ▁M ue ang ▁Ro i ▁Et , ▁and ▁Ch ang han ▁of ▁Ro i ▁Et ▁Province , ▁and ▁R ong ▁K ham ▁of ▁Kal as in ▁Province . ▁ ▁History ▁The ▁minor ▁district ▁( king ▁am ph oe ) ▁was ▁created ▁on ▁ 3 0 ▁April ▁ 1 9 9 4 , ▁when ▁six ▁tamb ons ▁were ▁split ▁off ▁from ▁Th aw at ▁B uri ▁District . ▁ ▁The ▁Th ai ▁government ▁on ▁ 1 5 ▁May ▁ 2 0 0 7 ▁upgrad ed ▁all ▁ 8 1 ▁minor ▁districts ▁to ▁full ▁districts . ▁With ▁publication ▁in ▁the ▁Royal ▁Gazette ▁on ▁ 2 4 ▁August , ▁the ▁upgrade ▁became ▁official . ▁ ▁Administration ▁The ▁district ▁is ▁divided ▁into ▁six ▁sub - d istrict s ▁( t amb ons ), ▁which ▁are ▁further ▁sub div ided ▁into ▁ 6 6 ▁villages ▁( m ub ans ). ▁There ▁are ▁no ▁municipal ▁( thes aban ) ▁areas ; ▁there ▁are ▁six ▁tamb on ▁administrative ▁organization ▁( TA O ). ▁ ▁References ▁ ▁External ▁links ▁am ph oe . com ▁ ▁Chi ang ▁Kh wan <0x0A> </s> ▁S G CC ▁U AV s ▁are ▁Chinese ▁U AV s ▁developed ▁by ▁State ▁Grid ▁Corporation ▁of ▁China ▁( SG CC ) ▁and ▁have ▁entered ▁service ▁in ▁China ▁for