The yellow metal hits a five-month high with demand driven by global geopolitical risks, with silver also rising.
Chile, Central America and Peru were the main destinations for Chinese steel exports to the region.
The country reported increases in iron ore pellet revenue and volumes in the first three months of the year.
The new rules, due to be enforced in December 2018, aim to capture 95% of smelter emissions.
Copper, gold, zinc, tin, iron ore and molybdenum exports all rose in February as companies increased shipments and benefitted from the ongoing price rally.
Will copper be at US$5,000/t or US$7,000/t in 2020? Expert opinions vary.