SHANGHAI, Jun. 23 (SMM) - Spot aluminum largely traded between RMB 13,360-13,370/mt in Shanghai and Wuxi on Monday, a discount of RMB 90-100/mt over SHFE 1407 aluminum contract. Mainstream traded prices were RMB 13,380-13,390/mt in Hangzhou. Sellers held offers firm, while downstream producers held to the sidelines. Traders showed high buying interest.