Affected by the end demand,quality and other factors,the consumption quantity in the market ,oil plants or other places is always not quick.And the oil plants control the purchasing standard strictly,leading the return rate higher.Affected by the various factors,it leads the sales in the production areas slow.Even though the end of the year is coming,if the demand quantity is always not changed,the price will be difficult to be increased.I suggest be caution when you make the purchasing or sales to avoid the risk.