碳酸锂期货主力合约午后短线下挫，日内涨幅缩窄至7%，此前一度涨12%

Group 1 - The core point of the article highlights the fluctuation in lithium carbonate futures, with the main contract experiencing a midday decline after previously reaching a 12% increase [1] - By the afternoon, the daily increase in lithium carbonate futures narrowed to 7%, indicating volatility in the market [1]