Where can I buy authentic sweet potato vermicelli?

Farmers' market, traditional craftsmen.

1. Farmers' market: In the farmers' market or farmers' market, you can find some stalls selling sweet potato vermicelli. These stalls are run by local farmers or craftsmen, and the quality of sweet potato vermicelli sold is relatively reliable and the price is relatively affordable.

2. Traditional craftsmen: In some rural areas, the traditional handicrafts of making sweet potato vermicelli are still preserved. You can find local farmers or craftsmen and buy authentic sweet potato vermicelli from each other. These sweet potato vermicelli are hand-made and of good quality.