 In the Southern Circuit a different monetary system was used than in the other circuits, as this circuit had been Dzungaria the Dzungar "pūl" (ﭘول) coin system was retained, these pūl coins composed of 99% copper, these new pūl coins were modeled after the Qianlong Tongbao cash coins, but due to their high copper content were red in colour hence they were known as "red cash coins" (紅錢) however the Qing government now faced the fact that the amount of copper ore available in the region was very little, in order to get the amount of copper needed to manufacture these "red cash coins", General Zhao Hui requested to the Qianlong Emperor in his July 1759 petition if he was allowed to reclaim old pūl coins from the locals to use as scrap metal and cast these new "red cash coins" from.These "red cash coins" had an official exchange rate with the pūl coins that remained in circulation of 1 "red cash" for 2 pūl coins.As Zhao Hui wanted the new can coins to have the same weight as pūl coins they weighed 2 "qián" (or 7.46 grams) and had both a higher width and thickness than regular cash coins.