The world's No. 2 copper producer said production of the red metal plunged 20.4% in the first half of 2020 versus the same period in 2019.
Gold production also fell 34.7% in the first six months of the year, while zinc output dropped off 23.7%, the country's Energy and Mines ministry said in a statement.
In Europe, shares fell on dismal earnings reports and data showing Europe's biggest economy Germany had shrunk by a record 10.1pc in the second quarter.
Positive COVID-19 vaccine developments, with Moderna Inc and Pfizer Inc launching two late-stage vaccines trials that could achieve regulatory approval and widespread use by end-2020.
The United States' move to shut the Chinese consulate in Houston, Texas on Wednesday prompted Beijing to consider closing the US consulate in the central city of Wuhan.
A week ago the metal touched a peak of $6,633 a tonne, the highest since 2018, up from a low of $4,371 in March.
A rebound in the economy of top metals consumer China and supply disruptions, mainly in the world's main producing region South America, has boosted prices.
The metal used in power and construction reached $6,633 on Monday after a spectacular rally from $4,371 in March, when the coronavirus spread worldwide.
The head of the International Monetary Fund said the global economy is "not out of the woods yet".
Copper on the London Metal Exchange has surged more than 40% since touching a 45-month low in March.
Momentum is really quite astonishing right now. Copper is within striking distance of hitting the January high and that is probably acting as a magnet to the market.