原标题：水利部：去年全国水土流失面积267万平方公里，少于十年前南都讯记者宋承翰 发自北京 9月13日，中宣部举办“中国这十年”系列主题新闻发布会，介绍十八大以来水利发展情况。    Chinese President Xi Jinping on Monday called for learning from late leader Jiang Zemin's firmness in political conviction.    Xi, also general secretary of the Communist Party of China (CPC) Central Committee and chairman of the Central Military Commission, made the remarks at a grand gathering held at the Great Hall of the People in commemoration of the birth centenary of Jiang.    Jiang had remained unswervingly firm in communist ideals, utterly loyal to the Party and the people, and resolutely committed to the cause of the Party and the people, said Xi.    The late leader had emphasized the importance of strengthening the Party's leadership and effectively improving Party building as the country advanced reform and opening up and developed its economy, he added.    On the new journey, it is imperative to uphold the overall leadership of the Party and the centralized, unified leadership of the CPC Central Committee, unswervingly strengthen the full and rigorous Party self-governance, and ensure the Party remains the strong leadership core in the cause of socialism with Chinese characteristics, said Xi.                    。水利部水旱灾害防御司司长姚文广称，2021年，全国水土流失面积267.42万平方公里，比2011年下降27.49万平方公里，强烈及以上等级占比下降到18.93%，水土保持率达到72.04%。同时，全国累计1000多万名贫困群众通过水土流失治理受益，年增收约50亿元。

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