Because of its unique use of "Dragon Whisker", another name for Longkou vermicelli, as a trademark, Longsu has become a nationally renowned enterprise in the Longkou Vermicelli Origin Conservation Area, and was recognized as "China's Well-known Trademark" in 2011, and was the only supplier of Longkou Vermicelli at the 2016 G20 Summit.
 
Different from the above-mentioned brands that complete the processing on the indoor assembly line, relying on the local climate advantages of four distinct seasons and moderate wind and temperature, the dragon beard adopts a natural drying method, and the vermicelli is slowly and evenly dried to ensure thorough dehydration. However, the traditional drying method is very challenging to the clean management of the drying site, and the vermicelli is packaged only after cleaning and secondary drying.
 
In addition, there are more than 11 vermicelli products made from sweet potatoes, purple potatoes, potatoes and even seaweed.
 
Longkou vermicelli is made of pea starch and mung bean starch as raw materials, the quality is not bad, the silk is fine and even, smooth and transparent, according to the net content and different packaging, there are as many as 27 models, the smallest one has a net content of only 50g, including a circle of powder, which is convenient to eat at one time, and 100g to 1000g of Longkou vermicelli is optional, 500g of Longkou vermicelli is sold for 16.8 yuan, which is the same as the price of Longda's snowflake vermicelli.
 
Sweet potato ring noodles are available in 50g and 300g, and the silk diameter is slightly larger than that of Longkou vermicelli, and the surface is slightly rough. The performance of sweet potato vermicelli, potato vermicelli and purple potato vermicelli is also decent, among which purple potato vermicelli and purple potato vermicelli are the same as purple potato vermicelli of catkins, all of which are added to the sweet potato starch with purple potato powder, and the purple potato vermicelli of dragon whisker is black in color, not bright enough for catkins.
 
Hot pot stewed powder is made of sweet potato starch and potato starch, the thickness is large, it is chewy, and there is a certain sticky taste, it is a good choice for making pork stewed vermicelli, a famous dish in Northeast China, 300g is sold for 10.8 yuan.
 
The packaging technology of the dragon beard is not good, and there will be occasional leakage of bags, so you need to pay attention when choosing.