▁most ▁of ▁these ▁early ▁round ▁co ins ▁had ▁round ▁holes , ▁the ▁first ▁" true " ▁c ash ▁co ins ▁were ▁the ▁Y i ▁H ua ▁( 一 化 ) ▁produced ▁by ▁the ▁State ▁of ▁Yan . ▁A part ▁from ▁two ▁small ▁and ▁pres umably ▁late ▁co ins ▁from ▁the ▁State ▁of ▁Q in , ▁co ins ▁from ▁the ▁sp ade ▁money ▁area ▁have ▁a ▁round ▁hole ▁and ▁refer ▁to ▁the ▁j in ▁and ▁li ang ▁units . ▁Those ▁from ▁the ▁kn ife ▁money ▁area ▁have ▁a ▁square ▁hole ▁and ▁are ▁denomin ated ▁in ▁h ua . ▁ ▁Round ▁hole , ▁no ▁r ims , ▁revers es ▁plain ▁and ▁flat ▁▁ ▁List ▁of ▁early ▁round ▁co ins ▁produced ▁between ▁ 3 5 0 ▁BC ▁and ▁ 2 2 0 ▁BC : ▁ ▁State ▁of ▁Yan ▁▁ ▁List ▁of ▁early ▁round ▁co ins ▁produced ▁by ▁the ▁State ▁of ▁Yan ▁between ▁ 3 0 0 ▁BC ▁and ▁ 2 2 0 ▁BC : ▁ ▁State ▁of ▁Q i ▁▁ ▁List ▁of ▁early ▁round ▁co ins ▁produced ▁by ▁the ▁State ▁of ▁Q i ▁between ▁ 3 0 0 ▁BC ▁and ▁ 2 2 0 ▁BC : ▁ ▁State ▁of ▁Q in ▁▁ ▁List ▁of ▁early ▁round ▁co ins ▁produced ▁by ▁the ▁State ▁of ▁Q in ▁between ▁ 2 5 0 ▁BC ▁and ▁ 2 2 0 ▁BC : ▁ ▁Q in ▁dynast y ▁▁ ▁During ▁the ▁Q in ▁dynast y ▁production ▁of ▁the ▁Ban ▁Li ang ▁c ash ▁co ins ▁continued ▁and ▁its ▁weight ▁was ▁standard