SHANGHAI, Apr. 25 (SMM) -- In domestic spot markets, spot discounts were firm as smelters were holding goods. Discounts of #0 zinc were between RMB 180-200/mt, with traded prices between RMB 15,330-15,350/mt. #1 zinc was traded between RMB 15,280-15,300/mt. As downstream buying interest was low at the end of the month and due to cash flow problems at traders, transactions were quiet.