The soil layer is deep and fertile, and the content of phosphorus and potassium in the sludge is high. Wengang taro, produced in Wengang Village, tanbu town, is the best taro in Tanbu, Huadu District, Guangzhou. After the taro is cut open, it can be seen that the taro is covered with tiny red ribs, which are similar to betel nut patterns, so it is called "betel nut taro". The soil layer in Wengang Village, tanbu town is deep and fertile, and muddy phosphorus and potassium are favorable conditions for planting taro. The taro produced here is big, starchy and delicious. In 2004, the trademark of "Wengang Areca Taro" was successfully registered and became a special agricultural product in Huadu.