METALS-Shanghai copper prices fall sharply on China demand jitters

(Adds analyst comment, updates prices) BEIJING, Dec 6 (Reuters) - Shanghai copper fell more than 3 percent on Wednesday, tracking a steep drop on the LME as investors wound in profits on concerns China could see a weaker first half of next year. Analysts said besides a rise in copper inventories, the selloff was fuelled by concerns about liquidity tightness in China towards the year-end, amid a government-led deleveraging push, and slowing investment in the country's power sector, a ke