How to draw Tomb-Sweeping Day's poster is as follows:

1. First, draw a picture of a shepherd boy riding a yellow cow, and write Tomb-Sweeping Day on the top of the picture. Draw a red branch in the upper right corner, which mainly introduces the introduction of Tomb-Sweeping Day. Introduce the name, time and significance of Tomb-Sweeping Day.

2. Draw a green branch in the lower right corner to introduce the origin of Tomb-Sweeping Day. Tomb-Sweeping Day was a formal festival in the Tang Dynasty and replaced the Cold Food Festival in the Song and Yuan Dynasties.

3. Draw a pink branch in the upper left corner to introduce Tomb-Sweeping Day's poems, the most famous of which is Qingming by Du Mu. Draw a brown branch in the middle of the left to introduce Tomb-Sweeping Day's local food, Amigo and Qingtuanzi.

4. Draw a rose branch in the lower left corner to introduce the customs of Tomb-Sweeping Day, mainly the activities of sweeping graves in ancient Tomb-Sweeping Day and modern Tomb-Sweeping Day. So Tomb-Sweeping Day's mind map was drawn.

Tomb-Sweeping Day, also known as outing festival, walking festival, March festival and ancestor worship festival, is celebrated at the turn of mid-spring and late spring. Tomb-Sweeping Day, which originated from the ancestors' belief and the custom of spring worship, is the most grand festival of ancestor worship for the Chinese nation. Tomb-Sweeping Day has two connotations of nature and humanity, which are both natural solar terms and traditional festivals. Grave-sweeping and ancestral worship and outing are two major themes of Tomb-Sweeping Day, which have been passed down in China since ancient times.