SHANGHAI, Aug. 19 (SMM) –Spot copper offers were quoted between premiums of positive RMB 100-220/mt today. Trade prices for standard-quality copper were between RMB 66,950-67,080/mt in the morning business, and RMB 67,000-67,200/mt for high-quality copper. SHFE copper prices had limited rebound room due to strong resistance, highlighting the characteristic of cautious trading sentiment on Monday. Cargo-holders still held offers firm, keeping market transactions muted. Market players generally take a wait-and-see attitude.