清明节是中国传统的节日，又称扫墓节。它的起源可以追溯到2500年前的周朝，是为了祭祀祖先和缅怀先人而设立的。在清明节这一天，人们会前往祖先的墓地，扫墓、上香、献花、祭拜、慰问等，表达对逝去亲人的缅怀之情。

除了祭祀祖先，清明节还有一个重要的活动，那就是踏青。踏青是指在春天的阳光明媚的日子里，走到自然景区或郊外，欣赏春天的美景，享受大自然的气息和悠闲的时光。这种活动不仅有益于身心健康，也是一种放松心情的好方式。

除了在中国，清明节也被一些其他国家的华人和东亚文化圈的国家所庆祝。在这个特别的日子里，我们可以一起缅怀先人，感受春天的气息，享受生活的美好。

In conclusion, Qingming Festival is a traditional Chinese festival, also known as Tomb Sweeping Day. Its origin can be traced back to the Zhou Dynasty 2500 years ago. It is set up to worship ancestors and commemorate the deceased. On this day, people will go to the ancestors' graves, sweep the tombs, offer incense, flowers, and pay respects to their loved ones.

In addition to worshipping ancestors, Qingming Festival also has an important activity, which is called 'treading on greenery.' It refers to walking to natural scenic spots or suburbs on sunny spring days, enjoying the beautiful scenery of spring, and enjoying the natural breath and leisure time. This activity is not only good for physical and mental health but also a good way to relax.

In addition to China, Qingming Festival is also celebrated by some overseas Chinese and East Asian cultural countries. On this special day, we can all commemorate our ancestors, feel the breath of spring, and enjoy the beauty of life together.