Yunnan children's songs. The top cover comes from the lyrics of "Glutinous Rice Tuantuan": Glutinous rice dumplings burn sarin fruit of dragon boat and sprinkle oil on the top cover of the river to stir fry. The top cover is a northeast dialect, which means that people fall into ice holes in the river in winter. Because the water below is flowing, it takes people away from their original position, and ice is on their heads, just like a pot cover, so they can't appear. Holding the pot cover means knowing whether to be beaten or to take the risk to speak, so holding the pot cover is to protect the head from being beaten.