Refined copper imports by China, the largest consumer, gained for the first time in four months in July as traders profited from disparities between prices in London and Shanghai.
The gold price in Hong Kong went down HK$63 to open at HK$11,315 per tael on Tuesday, according to the Chinese Gold and Silver Exchange Society.
Hong Kong stocks moved down 129. 66 points, or 0.62 percent to open at 20,759.35 on Tuesday.
ChiNext stocks slid 0.2 percent, or 2.4 points, to open at 933.58 points Tuesday.
China's stock index futures were lower at their openings Tuesday with the contract for settlement in August, the most actively traded, down 0.37 percent to open at 2,898.6.
China's stocks opened lower Tuesday with the benchmark Shanghai Composite Index down 0.11 percent to open at 2,636.53 points.
Hong Kong stocks closed down 92.81 points, or 0.44 percent, at 20,889.01 on Monday.
The ChiNext Index, launched by the Shenzhen Stock Exchange (SSE) on June 1, dipped 0.03 percent, or 0.33 points, to close at 995.61 on Monday.
China's stock index futures closed lower Monday with the contract for August, the most actively traded, down 1.85 percent from the previous trading day to end at 2,911.6 points.
Weak heavyweights dragged down Chinese stocks Monday, with the benchmark Shanghai Composite Index closed at 2,639.37, down 2.94 points, or 0.11 percent.
Farmers in China's Heilongjiang province are losing faith in soybean production because of growing imports of genetically modified varieties of the foodstuff.
The value of China's currency renminbi (RMB) weakened against the US dollar Monday as the central parity rate of the yuan was set at 6.7989 per US dollar, compared with the 6.7884 Friday, according to the data released by the China Foreign Exchange Trading System.