The Tangshan government held a symposium on Monday, considering lowering the output curtailment ratio for some mills that had finished ultra-low emission upgrades.
Shanghai copper price registered a second consecutive month of gains on Monday as prices firmed on a potential supply threat in Chile and massive US infrastructure spending plans.
China plans to strengthen controls in industries such as steel and aluminum which involve high energy use and produce high emissions, in an effort to promote low-carbon developments.
Chinese rebar and hot-rolled coil futures also jumped after the market recorded heavy losses over the past few weeks following the government's vow to stabilise commodity prices.