According 
              to the words from local elders and records in “Annuals of Xiji County”, 
              in Qin and Han dynasty, forest overlays reach to above 35%, there 
              ever has been the beautiful prospects of "when breeze blowing 
              lawn down, cow and sheep appear". Until Song dynasty, Xiji 
              County has large forest. Since Song and Ming Dynasty, cultivating 
              area gradually extend, the natural herding grass plants encounter 
              breakage. In Ming Dynasty, most parts of the area are pasture area. 
              Since Yongzheng period in Qing dynasty, planting develops rapidly, 
              the population quickly increases and over chopping down in disorder 
              immediately increases. Since 1949, with increasing of population, 
              the antinomy becomes very outstanding and the ecosystem environment 
              is extremely worsened. 
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          Gold autumn 
              October, our flower flew young team all the way arrive at Guyuan 
              ancient city in Ningxia happily singing and joking.It is regret 
              that we have not see panorama of ancient city. Before us, it is 
              break wall of damaged site in this ancient city. 
              The Guyuan ancient city is known in China and overseas. From 31 
              AD to 1933 A.D., more than ten military wars take place successively 
              in Guyuan ancient city and a damaging one happen in Donghan Dynasty 
              once. 
              Looking up at the broken walls of damaged site in ancient city, 
              it is the only "city memory", including endless diligence 
              and intelligence of people in the history process: the nitric smoke 
              rise everywhere, country broken up, the people find it hard to live 
              on, pastoral shabby, hungry everywhere, bleed to die everywhere. 
              The cruel heartless war breaks the environment we rely on for existence. 
              As a youth generation, we should keep firmly in mind historical 
              humiliation forever, the precept of blood!   | 
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