Chinese input unit

例句：

1. 1.China is the world's largest country by population.
   中国是世界上人口最多的国家。
2. 2.The Great Wall of China is one of the Seven Wonders of the World.
   中国的长城是世界七大奇迹之一。
3. 3. Chinese cuisine has a long history and diverse flavors.
   中国菜有着悠久的历史和多样的口味。