Nam O "Cho" porridge is not only a rustic dish but also a part of the cultural heritage of the Nam O ancient fishing village, in Lien Chieu district, Da Nang. This dish was born from the culinary convergence of the Central region, especially influenced by the Binh - Tri - Thien area (now Quang Binh, Quang Tri, and Thua Thien Hue). Originally, it was a variation of thick noodle soup (banh canh), sometimes called chao canh or chao vat giuong – a name evoking images of long, thick noodles resembling old wooden bed slats.
When "crossing the Hai Van Pass" to enter the land of Nam O, the dish was adapted by local people to suit their taste: the noodle strands were cut shorter, and the broth cooked thicker, creating a porridge-like smoothness. From then on, the name "chao cho" (waiting porridge) came to be, originating from the habit of cooking only when ordered, making diners wait about 10–15 minutes. That "waiting" became a unique characteristic, showcasing both meticulousness and reflecting the slow, patient pace of life of coastal residents.

Nam O is famous for its traditional fish sauce craft, and that very fish sauce is the "soul" creating the signature rich flavor of "cho" porridge. Fresh sea fish from early morning boat trips are cleverly utilized, preserving their natural taste while showcasing the thriftiness, simplicity, and subtlety of fishermen. Today, Nam O "Cho" porridge has grown beyond the small fishing village to become a familiar dish in Da Nang's culinary life, simple yet carrying the memories and spirit of Central Vietnam.

