Grain Rain (Chinese: 谷雨), the 6th solar term of the year, began this year on April 20 and ended on May 4. It begins when the Sun reaches the celestial longitudes of 30° and ends when it reaches the longitude of 45°. The meaning of the grain rain is that spring shower nurtures grains. Before and after few days of Grain Rain, the air humidity and rains increase, and thus it is great for plant-growing. [Photo by Wang Jin/Palace Museum]