Do you want to live forever? According to legend, drinking a drop of water from the dew tray can cure diseases and prolong life. Those who drink the water from the dew tray daily can live forever. Since the death of Emperor Wu of the Han Dynasty, the whereabouts of the Chenglu Pan have been unknown. Over the years, few people know about the Chenglu Pan. And 2000 years later, a stone tablet revealed the whereabouts of the dew plate.