BEIJING - Industrial metals extended gains on Tuesday in Shanghai, amid expectations that a more flexible yuan would boost China's imports of copper and zinc.

Zinc for September delivery on the Shanghai Futures Exchange rose by 360 yuan, or 2.49 percent, to close at 14,810 yuan per ton with a trading volume of 4,522 lots on Tuesday. It jumped by a daily limit of 5 percent on Monday.

Shanghai copper for September delivery edged up by 0.25 percent to 52,840 yuan per ton, on hopes that China, the world's largest consumer of the metal, will increase imports.