夜盘开盘，国内期货主力合约涨跌不一，烧碱、焦煤涨超1%，纯苯、原油、焦炭、PVC涨近1%，跌幅方面，国际铜跌超1%，沪铜跌近1%。

Group 1 - The domestic futures market opened with mixed performance among the main contracts, with caustic soda and coking coal rising over 1% [1] - Pure benzene, crude oil, coking coal, and PVC also saw nearly 1% increases [1] - In contrast, international copper fell over 1%, while Shanghai copper declined nearly 1% [1]