所以，防风固沙、建设绿色屏障就成了新中国成立初期特别重视的问题。
That’s why scientists, in a bid to put an end to the clouds of sand, decided to plant a forest here more than half a century ago.
为了制止风沙继续南侵，半个多世纪前的中国技术人员决定在这里创造出一片森林。
1962年2月，原林业部决定在河北省承德专区围场建立塞罕坝机械林场。
此后的55年里，林场三代人历经艰辛和挫折，凭着一腔热忱和顽强意志，铸就了一个荒漠变绿洲的奇迹。
绿色奇迹
为了追寻创业者种树的故事，方丹前去瞻仰了塞罕坝的“功勋树”。
This is known as the tree of honor, and it’s stood here for hundreds of years. And it served as inspiration for those scientists.
