The correct pronunciation of campsis powder is sháo fěn. analyzed as follows:

Campsis is a polyphonic word. It is pronounced tiáo when it refers to the flower of Campsis grandiflora, camelina, flower spike of reed, camelina stream (the name of water in a certain place), family name, etc. It is pronounced sháo when it refers to the alias of sweet potatoes (in dialect, sweet potatoes, sweet potatoes, sweet potatoes, also known as "red camelina"), and the meaning of silly (in Hubei and Shaanxi dialect).

Potato vermicelli generally refers to sweet potato vermicelli, which is made from sweet potatoes, some of which are in the form of long, thin gray strips that are crystal clear and similar to vermicelli. It can be said that the camas flour is a traditional ingredient folk ingredients, very tasty, smooth outside and tender inside for a long time to cook constantly, its flavor, healthy. It is a kind of Guangxi, Shaanxi, Hunan, Fujian, Sichuan, Guizhou and other places of local specialties, of which, the most famous is Sichuan camphor.

About sweet pota:

Sweet pota, also known as sweet potatoes, sweet storage, sweet potatoes, Zhu yam, golden potatoes, Fan Ru, red yam, jade pillow potatoes, yams, groundnuts, sweet potatoes, sweet potatoes, sweet potatoes, red potatoes, white potatoes, a goose, budding sweet potatoes. Produced mainly in hilly areas, part of the plains in China also grow sweet potatoes, but both low mountains, flat land, mild climate, abundant rainfall, long frost-free period, the four seasons are more conducive to the output of high-quality sweet potatoes.

The above content reference? Baidu Encyclopedia-Sichuan Potato Powder