In the reigns of the Ching emperors Hsien-feng (1851-1861) and Tung-chih (1862-1874), the custom of sending royal ships out to sea started to be accompanied by their cremation, which was known as "Riding the Milky Way," and this greatly reduced the number of royal ships reaching the shores of Taiwan.
流放王船到了清咸豐、同治年間開始有火化，叫「遊天河」，本地撿到王船的機會也就大為減少。