According to legend, as early as the seventh day of October in 557 AD, the day Chen Baxian and Emperor Chen Wu ascended the throne, Emperor Chen Wu announced that a banquet would be held at a quarter past noon the next day to celebrate the birth of the Chen Dynasty. He hoped that all officials and maids in the palace would be happy to attend. Sign up and each cook a meal. Requirements: First, it must be auspicious, second, it must be delicious, third, it must be healthy, and fourth, it must be unique. If everything is in line with the emperor's wishes, there will be many rewards.

The next day, there was a banquet. Sixteen dishes were served, all of which were top-quality delicacies, with both color and flavor. Those present all spoke highly of them, but Emperor Chen Wu was still reluctant to speak of Chrysostom. Finally, a palace maid presented a plate of noodles. Chen Wudi saw that the noodles were thin and long and the craftsmanship was very good, so he asked the person who served the dish his name. The palace maid replied: "Wan-shun-cai". When Emperor Chen Wu heard it, he was very impressed and even praised the name. Asked the name of the dish again. Wan Shuncai replied: "Changfu Longevity Noodles". Emperor Chen Wu was very happy after hearing this and rewarded Wanshuncai heavily. He told those present that this aspect heralded that the country of the Chen Dynasty would be "successful" and the people of the Chen Dynasty would be "long-lived and blessed."

After that, every time a distinguished guest arrived in the palace, Wanshuncai would offer a bowl of Changfu Longevity Noodles to show his kindness. Later, women in confinement and old people celebrating their birthdays also had this privilege. The former eat this noodle because it is made from fine white wheat flour and has high nutritional value. It can be eaten by women to replenish their health after giving birth. The latter eats it purely to seek "longevity and happiness". However, in Jiangsu and Zhejiang areas, it is generally not called Changfu Changshou Noodles, but Suomian. It is the original homonym of "Shamian" in Ruian dialect, which refers to its characteristics of being as thin as cotton yarn.