It spread to Japan  nearby islands in the early 17th century. Sweet potatoes were introduced to China at the end of the 16th century, shortly after their arrival in Southeast Asia. There are currently different views in the academic community on the path of transmission,  there are four clear explanations: the theory of transmission  Fujian, the theory of transmission  Guangdong, the theory of transmission  Zhoushan,  the theory of transmission  Yunnan.

This refers to the transmission  Luzon Island in the Philippines to the Fujian region. The historical data of this statement is full  accurate. Many Chorography  celebrity notes have records in the middle. Ming Wen Qiao Yuan once wrote an article, "Ode to Sweet Potato", which was included in the volume 150 of his book, "Records of Southern Production - Sweet Potato", which mentioned that "in the Wanli, Fujian people get foreign countries.

Dried potatoes can be grown in barren  sandy areas to support the elderly  benefit the poor. Secondly, only individual cultivation of sweet potatoes has  been promoted locally, so it can only be considered as an experimental cultivation by individuals, rather than a true introduction of species. Sweet potatoes are sweet potatoes. Sweet potato morphological characteristics: Sweet potato has a spindle shaped appearance  a distinct petal like structure.