These are clear noodles.
Glass noodles are clear noodles. 
Glass noodles are a special kind of noodle. They are clear when you cook them. This is why people call them glass noodles. 

Glass noodles are a very special kind of food. They are famous for being clear and see-through when they are cooked. This is why many people call them glass noodles or cellophane noodles.
Making these noodles is a very interesting thing that happens. First, makers use starch and water to create them. Starch can come from many different plants. Some noodles use mung bean starch or potato starch. Others use sweet potato starch, tapioca, or canna starch.
These noodles have a long history in China. The town of Zhangxing in Shandong province is a main place where they are made. 
Many different countries have their own way of eating them. In Korea, they are called dangmyeon and are often thick. 
Glass noodles travel far and connect many different foods. In Hawaii, they are known as long rice. People say this name comes from how they are made. They are pushed through a tool like a potato ricer. In Samoa, they are called lialia. This name means "to twirl" in Samoan. It describes how people twirl noodles around chopsticks.
Glass noodles are a unique type of transparent noodle. They are often called cellophane noodles because of their clear appearance. This clarity only appears after the noodles are cooked in water. They are quite different from rice vermicelli. Rice vermicelli is white in color, whereas glass noodles become see-through.
Making glass noodles involves a specific process using starch and water. Producers use starches from various plants to create different textures. Common sources include mung bean starch, potato starch, or sweet potato starch. Other varieties use tapioca or canna starch.
There are many distinct types of glass noodles based on their starch source. In China, mung bean starch creates noodles called Chinese vermicelli or bean threads. Sweet potato starch is used to make varieties called fentiao or hongshufen. Korean versions, known as dangmyeon, are often thicker and use sweet potato starch. In Japan, harusame noodles are usually made from potato starch. Even in Vietnam, there are two main types. One is made from mung bean starch, while the other, called miến dong, uses canna starch.
History shows that these noodles have deep roots in China. The town of Zhangxing in Shandong province is a primary production site. Historically, these noodles were shipped through the port of Longkou. Because of this trade route, they are marketed as Longkou fensi. 
Glass noodles appear in a wide range of specific dishes. In China, they are used in stir-fries and hot pots. A Sichuan dish called "ants climbing a tree" uses them with spicy pork sauce. In Korea, the popular dish japchae features thick noodles stir-fried with sesame oil and beef.
Different cultures have developed unique names and methods for these noodles. In Japan, the name harusame literally means "spring rain." In Samoa, they are called lialia, which means "to twirl." This name comes from the way people twirl noodles around chopsticks.
While these noodles are delicious, there have been some important safety concerns. In 2004, some companies in Yantai, China, were found to be dishonest. They used cornstarch instead of green bean starch to save money. To keep the noodles looking clear, they added chemicals like sodium formaldehyde sulfoxylate and lead-based whiteners. In 2010, inspectors in the Czech Republic found excessive levels of aluminum in Chinese glass noodles. These incidents highlight the importance of food safety regulations in global trade.
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